<ul id="8aumu"></ul>
  • <strike id="8aumu"></strike>
  • <ul id="8aumu"></ul>
    食品伙伴網服務號
     
     
    當前位置: 首頁 » 專業英語 » 專業詞匯 » 正文

    進出口專業英語詞匯(F6)

    放大字體  縮小字體 發布日期:2008-02-21
    核心提示:fuel pressure indicator 燃料壓力指示器 fuel pressure switch 燃料壓力開關 fuel pressure transmitter 燃油壓力傳感器 fuel pump bush 燃油泵襯套 fuel pump cam 燃油泵凸輪 fuel pump idle gear 燃油泵惰齒輪 fuel pump impeller 燃油泵葉輪 fuel pump intermediat

    fuel pressure indicator 燃料壓力指示器
    fuel pressure switch 燃料壓力開關
    fuel pressure transmitter 燃油壓力傳感器
    fuel pump bush 燃油泵襯套
    fuel pump cam 燃油泵凸輪
    fuel pump idle gear 燃油泵惰齒輪
    fuel pump impeller 燃油泵葉輪
    fuel pump intermediate transmission gear 燃油泵中間傳動齒輪
    fuel pump plunger 燃油泵柱塞
    fuel pump spill valve 燃油泵回油閥
    fuel pump transmission gear 燃油泵傳動齒輪
    fuel pump with vacuum pump 帶真空泵的燃油泵
    fuel pump 油泵
    fuel rack control spring 燃油齒條控制彈簧
    fuel regulating handle 燃油調節手柄
    fuel regulating shaft 燃油調節軸
    fuel regulator 燃油調節器
    fuel resin 燃料樹脂
    fuel runout warning device 燃料耗盡報警器
    fuel selection switch 燃料選擇開關
    fuel separator 燃油分離器
    fuel servicing truck 燃料供應車
    fuel ship 燃料供應船
    fuel strainer 燃料粗濾器
    fuel swirler 離心式燃料噴射器
    fuel tank 油箱
    fuel tanker 油輪
    fuel tester 燃料測試器
    fuel transfer pump 燃油輸送泵
    fuel truck 加油車
    fuel turbopump 燃料渦輪泵
    fuel type vacuum tower 燃料型減壓塔
    fuel viscosity automatic control equipment 燃油粘度自動調節設備
    fuel 燃料
    fuel-metering pump 燃料計量泵
    fuel-oil atomizer 燃料油霧化器
    fuel-oil melting furnace 燃油熔煉爐
    fueller 加油器
    fugitometer 褪色計
    fui 優質黃麻
    Fuji color film roll 富士彩色膠卷
    Fuji palace 富士派力斯
    Fuji silks 絹絲紡
    Fuji 富士牌感光材料
    Fujibo Spandex 富士紡聚氨酯絲
    Fujica 富士卡牌照相機
    Fujicolor Quicksnap 富士自拍膠卷
    fujiette 富士紡
    Fujione 富士一號
    Fujithion 對氯磷
    fukiye prints 噴印花布
    Fuklasin 福美鋅
    Fukui habutae 福井電力紡
    Fukui silk 福井雙縐
    Fulcin 灰黃霉素
    fulcrum bar 支桿
    Fulflex 富爾弗勒克斯聚氨基甲酸乙酯纖維
    full adder 全加器
    full aperture drum 活底桶
    full approximation storage 全近似存儲器
    full auto washing machine clutch 全自動洗衣機離合器
    full automatic book sewing machine 全自動鎖線訂書機
    full automatic camera 全自動照相機
    full automatic electric resistance welding can-body shaping machine 全自動電阻罐身成形機
    full automatic horizontal cold chamber die casting machine 全自動臥式冷室壓鑄機
    full automatic lathe 全自動車床
    full automatic power supply controller 全自動供電控制器
    full automatic two-station type shoes making machine 全自動雙站式制鞋機
    full automatic zig zag sewing machine 全自動萬能縫紉機
    full blood wool 美利奴純血統羊毛
    full bright nickel plating additive 全光亮鍍鎳添加劑
    full cape 圓形披風
    full carbon paper 雙面碳紙
    full chintz 深淺紅色底擦光印花布
    full circle crane 全旋轉式起重機
    full core fibre 全芯纖維
    full cover stabilizer 全覆蓋式穩定器
    full cover 書面細布
    full cut woollen rug with latex back 羊毛全片地毯
    full decator 密閉蒸呢機
    full digital answering machine 全數字應答機
    full dress coat 男用大禮服
    full dress 大禮服
    full duplex voice cipher set 全雙工話密機
    full electronic telephone exchange 全電子式交換機
    full electronic typesetter 全電子式照相排字機
    full elliptic spring 全橢圓形彈簧
    full flared skirt 喇叭長裙
    full flight screw 全螺紋螺桿
    full floating axle 全浮式軸
    full floating back axle 全浮式后軸
    full flow filter 滿流過濾器
    full frequency speaker 全頻揚聲器
    full function CNC turning machine 全功能數控車床
    full gantry crane 雙腳高架起重機
    full gauge stabilizer 全尺寸穩定器
    full gauge whipstock 全尺寸造斜器
    full grain cow leather for garment 黃牛皮全粒面服裝革
    full grain goat leather for garment 山羊皮全粒面服裝革
    full grain leather 全粒面皮革
    full grain sheep leather for garments 綿羊皮全粒面服裝革
    full graphic control panel 全圖示面板
    full graphic panel 全圖示面板
    full grinding roller 長磨輥
    full hydraulic articulated  loader 全液鉸接裝載機
    full hydraulic crawler excavator 全液壓履帶式挖掘機
    full hydraulic crawler type dozer 全液壓履帶式推土機
    full length stockings 舞襪
    full length wall mirror 全長度墻鏡
    full lift valve 全升程閥
    full motion antenna 全動天線
    full motion video compression board 動態圖壓縮板
    full panel metal bed 全部板條金屬
    full parabolic reflector 全拋物面反射器
    full pitch winding 整節距繞組
    full radiator 全輻射器
    full reflector 全光反射鏡
    full regular 全成形針織品
    full rotating derrick 全轉式扒桿起重機
    full size newspaper press 整幅卷筒紙新聞印刷機
    full skin fibre 全皮纖維
    full skirt 寬下擺女裙
    full slip 長襯裙
    full starting motor 全電壓起動電動機
    full strength ginseng 大力參
    full strength tobacco 濃味煙絲
    full subtractor 全減器
    full trailer ship 整拖船
    full trailer 重型拖車
    full tricot 滿穿雙梳櫛經平織物
    full tubular rivet 空心鉚釘
    full universal drill 萬能鉆床
    full universal radial drilling machine 萬能搖臂鉆床
    full vision dial 全視刻度盤
    full voile 雙股巴里紗
    full wave valve rectifier 全波電子管整流器
    full wave voltage doubler 全波倍壓器
    full weft raschel machine 全幅襯緯拉舍爾經編機
    full white yarn 全漂白紗
    full width loom 平幅織機
    full wrap design blade stabilizer 全覆蓋翼片式穩定器
    full-analog simulator 全模擬模擬器
    full-automatic alternating current stabilized voltage supply 全自動交流穩壓電源
    full-automatic injection mold 全自動注塑機
    full-automatic machine for manufacturing plastic bottle 全自動塑料制瓶機
    full-automatic milk packaging machine 全自動牛奶包裝機
    full-automatic rotary type two-color plastic shoes making machine 全自動輪轉式雙色塑料鞋制造機
    full-automatic turret screw machine 自動六角車床
    full-automatic type in-line screw plastic injection mould machine 全自動螺旋直射式注塑機
    full-bore tubing tester 貫眼油管測試器
    full-cream milk powder 全脂奶粉
    full-cross gauze 全絞式紗羅織物
    full-fashioned hosiery 全成形襪子
    full-fashioned machine 全成形平型針織機
    full-fashioned stockings 全成形長襪
    full-floating piston pin 全浮式活塞銷
    full-flow oil filter 全流機油濾清器
    full-harness damask 單把吊提花緞
    full-hydraulic excavator 全液壓挖掘機
    full-hydro-driller 全液壓鉆機
    full-length information display system 全長度信息顯示系統
    full-length-concavo-convex mirror 全長度凹凸鏡
    full-mounted combine grain seeder 全懸掛聯合谷物播種機
    full-piece woven carpet 滿鋪編織地毯
    full-plastics open type bidirectional exhaust fan 全塑開敞式雙向換氣扇
    full-revolving back hoe excavator 全轉式反鏟挖土機
    full-rough Peruvian cotton 秘魯粗絨棉
    full-track tractor 全履帶式拖拉機
    full-wave doubler 全波倍壓器
    full-wave mercury rectifier 全波汞孤整流器
    full-wave rectifier 全波整流器
    full-wave rectifying type X-ray apparatus 全波整流式X射線機
    full-wave square-law detector 全波平方律檢波器
    full-width fertilizer distributor 全幅撒肥機
    full-width scouring machine 平幅洗呢機
    full-width seed broadcaster 全幅寬撒播機
    fulled fabric 縮絨織物
    Fuller cell 富勒電池
    fuller 套錘
    fuller's earth 漂白土
    fullering tool 壓槽錘
    fulling agent 縮絨劑
    fulling machine 縮絨機
    fulling mill 縮絨機
    fullness imparting fish oil 豐滿魚油
    fullness imparting lard oil 豐滿豬油
    fully acetylated cotton 高度乙酰化棉纖維
    fully automatic circular knitter 全自動圓型針織機
    fully automatic egg-packing set 全自動裝蛋機
    fully automatic feather quilting machine 全自動羽絨絎縫機
    fully automatic oil-fired boiler 全自動燃油鍋爐
    fully automatic programming NC wire 全自動編程數控線
    fully automatic quartz turntable 全自動石英唱盤
    fully automatic reperforator 全自動復鑿機
    fully automatic seamless glove knitting machine 全自動無縫手套針織機
    fully automatic transfer press 全自動傳輸壓力機
    fully bleached linen 全漂亞麻布
    fully degummed silk 全脫膠蠶絲
    fully deoxidized steel 全脫氧鋼
    fully drawn texturing yarn 全拉伸變形絲
    fully drawn yarn 全拉伸絲
    fully electronic audio frequency time delayer 全電子音頻延時器
    fully electronic reverberator 全電子混響器
    fully electronic telephone exchange 全電子電話交換機
    fully enclosed conveyer 全封閉式運輸機
    fully enclosed motor 全封閉式電動機
    fully fashioned garment 全成形針織品
    fully fashioned knitting machine 全成形針織機
    fully filled optical fiber cable 全填充式光纜
    fully hardened steel 全硬化鋼
    fully hydraulic truck crane 全液壓汽車起重機
    fully intermateable optical cable connector 全互配光纜連接器
    fully intermateable optical fiber connector 全互配光纖連接器
    fully mounted plough 全懸掛式犁
    fully mounted seed drill 全懸掛播種機
    fully-automatic analytical mass spectrometer 全自動分析用質譜儀
    fully-automatic book sewing machine 全自動鎖線訂書機
    fully-automatic diesel generating set 全自動柴油發電機組
    fully-automatic grinder 全自動磨床
    fully-automatic honing machine 全自動搪磨機
    fully-automatic jacquard machine 全自動提花機
    fully-digital ciphering equipment 全數字加密設備
    fully-fashioned knitwear 全成形針織物
    fully-fashioned outerwear 全成形外衣
    fully-fashioned rib garment 全成形羅紋外衣
    fully-fashioned stockings 全成形長襪
    fully-flooded dye machine 全浸沒式染色機
    fully-insulated nitrogen-sealed transformer 全絕緣氮封變壓器
    fully-refined paraffin wax 全精煉白石蠟
    fully-transistorized fish finder 全晶體管化探魚儀
    fulminating mercury 雷汞
    fulminic acid 雷酸
    fulvicin 灰黃霉素
    fumagillin 夫馬菌素
    fumaric acid 延胡索酸
    Fumarin 氟乙酰胺
    fumarole acid 硼酸
    fumaruric acid 富馬尿酸
    Fumasol 克滅鼠
    Fumazone 二溴氯丙烷
    fume collection equipment 集煙設備
    fume cupboard 通風柜
    fume extraction fan 排煙風扇
    fume extractor 排煙機
    fume hood 通風櫥
    fume-resisting machine 防煙式電機
    fumed cocoon 熏繭
    fumigant 熏蒸劑
    fumigating stick 熏蒸棒
    fumigation preparation 熏蒸制劑
    fumigation unit 薰蒸裝置
    fumigator 熏蒸消毒器
    fuming acid 發煙酸
    fuming cupboard 通風櫥
    fuming hood 通風柜
    fuming nitric acid 發煙硝酸
    fuming sulphuric acid 發煙硫酸
    Fumite TCNB 四氯硝基
    fun fur 化纖花式裘皮
    Funai 福奈牌錄像機
    function fitter 函數擬合器
    function generator 函數發生器
    function multiplier 函數乘法器
    function plotter 函數描圖器
    function recorder 函數記錄器
    functional analog computer 函數式模擬計算機
    functional electrical stimulator 功能電刺激器
    functional generator 函數發生器
    functional potentiometer 函數電位器
    functional residual capacity analyser 機能余氣量分析器
    functional respiratory counter 機能呼吸量計
    Fundal 殺蟲脒
    fundamental wave resonator 基波共振器
    Fungchex 雙汞混劑
    fungicedal powder 殺菌藥粉
    fungicidal ointment 殺菌軟膏
    fungicide sprayer 殺菌劑噴灑器
    fungicide 殺真菌劑
    fungicidin 制霉菌素
    Fungiclor 五氯硝基苯
    Fungilon 鐵菌清
    fungistat 抑菌劑
    fungizone intravenous injection 靜注用兩性霉素B
    Fungo 50 甲基托布津
    fungus of larch 落葉松茸
    fungus 木耳
    funicular  car 纜索車
    funicular machine 靜力試驗機
    funnel stand 漏斗架
    funnel tube with filter 帶濾器漏斗
    funnel tube 漏斗管
    funnel viscosimeter 漏斗粘度計
    funnel 漏斗
    fur animal toy 皮毛動物玩具
    fur article 皮毛制品
    fur black 毛皮黑
    fur brown 毛皮棕
    fur brush cleaner 毛刷清潔器
    fur brush 毛刷
    fur cap with earflaps 帶護耳皮帽
    fur cap 毛皮帽
    fur cape stole for lady 裘皮女披肩
    fur cape 裘皮披肩
    fur cloth 仿毛皮織物
    fur coat 裘皮上衣
    fur collar gabardine surcoat 軋別丁絨皮領外衫
    fur collar jacket 皮領茄克衫
    fur collar overcoat 皮領大衣
    fur cuffed and lined capeskin gloves 毛皮袖口和襯里羊皮手套
    fur cushion 裘皮靠墊
    fur fabric 仿毛皮織物
    fur facing lashing machine 正面裘皮縫紉機
    fur fibre 毛皮纖維
    fur garment sewing machine 皮裝縫制機
    fur garment 皮衣
    fur goods 毛皮制品
    fur hat 裘皮帽
    fur imitation plush 仿毛皮長毛絨織物
    fur imitation 仿毛皮織物
    fur jacket 裘皮短大衣
    fur lined coat 裘皮大衣
    fur lined jacket 短皮襖
    fur lined robe 皮袍
    fur necklet 皮毛頸圍
    fur overcoat 裘皮大衣
    fur patchwork 皮毛畫
    fur picture 皮毛畫
    fur plate 皮褥子
    fur products 裘皮制品
    fur rug 毛皮毯
    fur scarf for lady 裘皮女圍巾
    fur scarf 毛皮圍巾
    fur sewing machine 毛皮拼縫機
    fur shawl scarf 裘皮披肩圍巾
    fur skin mounted with head 鑲頭裘皮
    fur skins 毛皮
    fur stole 裘皮披肩
    fur topcoat 皮上衣
    fur toy 裘皮玩具
    fur trimmed hood of cotton corduroy 毛皮鑲飾棉條紋絨布雪帽
    fur vest 裘皮背心
    fur 毛皮
    fur-blend yarn 毛皮纖維混紡紗
    fur-effect fabric 毛皮狀織物
    fur-felt hat 絨毛氈帽
    fur-felt 絨毛氈
    fur-knitting electronic jacquard machine 針織毛皮電子提花機
    fur-like fabric 仿毛皮織物
    fur-lined capeskin gloves 毛皮襯里羊皮手套
    fur-lined gloves 毛皮里手套
    fur-lined shoes 毛襯里皮鞋
    fur-type fabric 人造毛皮
    Fura 富拉牌照相機
    furacilinum 呋喃西林
    furacrinic acid 呋拉尼酸
    Furadan 蟲螨威
    furalazine 呋喃拉嗪
    furaldehyde 呋喃甲醛
    furaltadone 呋喃他酮
    furan consolidating resin 呋喃膠結樹脂
    furan resin 呋喃樹脂
    furan resin-sand 呋喃樹脂砂
    furan 呋喃
    furan-carboxylic acid 呋喃甲酸
    furanacrylic acid 呋喃丙烯酸
    furaprofen 呋喃洛芬
    furapromide 呋喃丙胺
    furapyrimidone 呋喃嘧酮
    furazabol 呋拉扎勃
    furazolidone 呋喃唑酮
    furazolium chloride 呋唑氯銨
    furbenicillin 呋脲芐青霉素
    furbishing preparation 擦亮制劑
    Furcraea fibre 富克雷亞纖維
    furethrin 抗蟲菊
    furfenorex 呋芬雷司
    furfural acetone resin 糠酮樹脂
    furfural grease 糠醛潤滑潤
    furfural oxime 呋喃肟
    furfural resin 糠醛樹脂
    furfural treating tower 糠醛抽提塔
    furfural 糠醛
    furfurol 糠醛
    furfuryl acetate 乙酸糠醇酯
    furfuryl alchohol modified phenolic resin 糠酚醛樹脂
    furfuryl alchohol modified urea formaldehyde resin 糠脲醛樹脂
    furfuryl alcohol 糠醇
    furfuryl resin 糠基樹脂
    furfuryl-alcohol resin 糠醇樹脂
    furidarone 呋碘達隆
    furidazol 麥穗寧
    furil 聯呋喃甲酰
    furil-dioxime 聯呋喃甲酰二肟
    furilazone 呋煙腙
    Furloe 氯苯胺靈
    furnace and oven blower 爐灶鼓風機
    furnace bar 爐條
    furnace black 爐法炭黑
    furnace chain 爐鏈
    furnace charge level recorder 爐料料位記錄器
    furnace charging conveyer 裝爐機
    furnace coal 冶金煤
    furnace coil 熔爐線圈
    furnace coiler 爐用卷取機
    furnace coke 冶金焦炭
    furnace cover 爐蓋
    furnace discharge conveyer 出爐機
    furnace fire bar 爐條
    furnace for brightness 光亮爐
    furnace for testing room 實驗室電爐
    furnace gas condenser 爐氣冷凝器
    furnace gas scrubber 爐氣洗滌器
    furnace grill 爐箅子
    furnace gun 工業爐噴槍
    furnace hoisting machine 高爐提升機
    furnace in fluid bed 沸騰爐
    furnace of calcium carbide 電石爐
    furnace oil 高爐燃油
    furnace roller 爐輥
    furnace scanning periscope 熔爐觀測鏡
    furnace scoop 爐灶鏟斗
    furnace transformer 熔爐用變壓器
    furnace tube 爐管
    furnatron 爐溫電子控制器
    furnishing fabric 裝飾織物
    furnishing print 裝飾印花布
    furnishing trimming 家具飾帶
    furnishing yarn 家具裝飾紗線
    furniture caster of metal 家具用金屬腳輪
    furniture caster 家具用腳輪
    furniture cord 家具套飾帶
    furniture damask 家具花緞
    furniture denim 家具斜紋布
    furniture duster 家具除塵器
    furniture fabric 家具織物
    furniture of hardwood 硬木家具
    furniture of rosewood 紅木家具
    furniture of steel and wood 鋼木家具
    furniture of steel 鋼家具
    furniture plush 家具絲絨
    furniture pull 家具拉手
    furniture twill 家具斜紋印花布
    furniture upholstery 家具裝飾材料
    furniture web 家具織帶
    furniture 家具
    furoate 糠酸鹽
    furodiazole 呋羅達唑
    furofenac 呋羅芬酸
    furoic acid 糠酸
    furol viscosimeter 糠醛粘度計
    Furon 富綸聚酰胺纖維
    furosemide injection 速尿注射液
    furosemide 呋喃苯胺酸
    furostilbestrol 呋羅雌酚
    furoyl chloride 呋喃甲酰氯
    furoyl 糠酰
    furoylamide 呋喃甲酰胺
    furring plane 粗刨
    furring tile 面瓷磚
    furrow plow 鏵式犁
    furrow press 耕溝土垡壓平器
    furrow wheel 溝輪
    furrow width adjuster 耕溝寬度調節器
    furrow-irrigation machine 澆灌機
    furrowing blade 開溝鏟
    furrowing machine 開溝機
    fursalan 呋沙侖
    fursultiamine 呋喃硫胺
    furterene 呋氨蝶啶
    furtrethonii iodidum 青光安
    furtrethonium iodide 呋索碘銨
    furylamine 呋喃甲胺
    fusafungine 夫沙芬近
    Fusares 四氯硝基苯
    fuse box 保險絲盒
    fuse cut-out porcelain base 可熔保險器瓷底座
    fuse cutout 可熔保險器
    fuse protector 熔斷器
    fuse receptacle 保險絲插座
    fuse strip 熔線片
    fuse time computer 引信時間計算機
    fuse tongs 熔絲管鉗
    fuse tube 熔絲管
    fuse wire 熔斷絲
    fuse 熔斷器
    fuse-isolator 熔斷式隔離器
    fuse-type thermometer 熱熔型溫度計
    fused alumina manufacturing technology and complete design technology 電熔剛玉磨料制造與設計技術
    fused basic brick 熔鑄堿性耐火磚
    fused calcium chloride 熔融氯化鈣
    fused calcium-magnesium phosphate 熔融鈣鎂磷
    fused cast alumina brick 熔鑄氧化鋁磚
    fused cast magnesite-chrome brick 熔鑄鎂鉻磚
    fused cast mullite brick 熔鑄莫來石磚
    fused cast refractory brick 熔鑄耐火磚
    fused cast zirconia-alumina brick 熔鑄鋯剛玉磚
    fused disconnecting switch 熔斷開關
    fused magnesite brick 電熔鎂磚
    fused magnesium phosphate fertilizer 熔融鎂磷肥
    fused plug 安全塞
    fused quartz outer diameter controller 熔融石英外徑控制器
    fused quartz 熔凝石英
    fused ring 稠環
    fused silica fiber 熔凝石英光纖
    fused silica glass 熔融石英玻璃
    fused silica 熔凝石英
    fused singlemode coupler 熔凝單模耦合器
    fused switch 保險開關
    fused transistor 合金型晶體管
    fused tube 信管
    fused-taper coupler 熔融錐式耦合器
    fusel oil 雜醇油
    fusible alloy 易熔合金
    fusible circuit breaker 熔絲斷路器
    fusible cone 測溫三角錐
    fusible metal film resistor 保險絲型金屬膜電阻器
    fusible metal 易熔金屬
    fusible resistor 可熔電阻器
    fusible safety plug 可熔安全塞
    fusidic acid 夫西地酸
    fusing heater 熔化加熱器
    fusing machine 熔化機
    fusing point determination apparatus 熔點測定器
    fusing soldering welder 熔焊機
    fusion cutting off machine 熔化切割機
    fusion free fibre 不熔纖維
    fusion splicer 熔接器
    fusion splicing machine 熔接接頭機
    Fusion 富申牌手表
    fusion-cast refractory 熔鑄耐火材料
    Fuso Fighter 扶桑戰士牌汽車
    Fuso 扶桑牌汽車
    fuss type automatic voltage regulator 振動式自動調壓器
    Fussol 氟乙酰胺
    fusta 西班牙粗紡呢
    fustian cord 燈芯絨
    fustian 緯起毛織物
    futaine 緯起絨毛織物
    Futelon 福特龍牌手表
    Futostrep 鏈霉素
    Futura 未來牌旅游大客車
    fuze high-speed spinning tester 引信高速旋轉測試儀
    fuzzy filter 模糊濾波器
    fuzzy silk 茸毛絲
    Fybrite 斐布賴特具有抗靜電性能的聚酯織物
    Fyfanon 馬拉松
    更多翻譯詳細信息請點擊:http://www.trans1.cn
     
    關鍵詞: 進出口 專業 詞匯(F6)
    [ 網刊訂閱 ]  [ 專業英語搜索 ]  [ ]  [ 告訴好友 ]  [ 打印本文 ]  [ 關閉窗口 ] [ 返回頂部 ]
    分享:

     

     
    推薦圖文
    推薦專業英語
    點擊排行
     
     
    Processed in 0.137 second(s), 16 queries, Memory 0.93 M