BUTT-WELDING ELBOW SCH STD TO 80 & SCH STD OF 90º LONG RANGECONCENTRIC REDUCTION SCH STD TO 80 AND EXENTRIC是啥意思?flange 法兰产品上的

butt welding 英语翻译I want to use Butt- welding for carbon steel,stainless steel,Alloy steel.from 12to 12.Elbow,Tee,Reducer.全文如上,求翻译, BUTT-WELDING ELBOW SCH STD TO 80 & SCH STD OF 90º LONG RANGECONCENTRIC REDUCTION SCH STD TO 80 AND EXENTRIC是啥意思?flange 法兰产品上的 pinch one's butt suck one's butt get one's butt over... butt butt 碰焊用英语怎么说?应该是点焊,电阻焊接的那种.是不是resistance spot welding.butt-welding是碰焊,是不是太笼统了一点,碰焊有很多种、 90 DEG ELBOW STAINLESS STEEL BUTT WELD SCH.10 20 ASTM A403 ( TWO JOINT)怎么理解TWO JOINT falls on one's butt啥意思 up one's butt要地道 英语翻译Automatic valve sight glassFlat gasket tee 以上恳请帮忙measuying point tee reduced pipe welding neck flangepipe elbow hex screw push/shoulder/elbow/edge one's way through a crowd 阀门行业的问题 deg butt weld TEE EQUAL 3 90 DEG BUTT WELD S.S (A403) GR.WP 316 SCH.10S elbow my elbow是什么意思 elbow是什么意思