forging steel flange是什么意思

forging steel flange是什么意思 fucinati steel forging ① Flange HU in steel 8 (RM＞600MPA)中HU是什么意思?② Diameter on nets 是什么直径?如上 steel steel steel steel vent flange spool flange , 法兰描述：STEEL FLANGE RF/FLAT BACK ANSI B16.47B 其中的flat back是什么意思?O(∩_∩)O谢谢 procure monthly 10K of the DIN 6927 Flange Nut M16 steel zinc plated 翻译并解释该法兰的材料 forging 请说明白点! pancake forging是什么意思 英语翻译The rotor consists of a shaft and starshaped,laminated pole structure,exciter and fan(s) .The shaft is machined of steel forging orround steel bar.The pole structure is manufactured of sheet steel and isshrink fitted onto the shaft.The po body flange 是什么法兰? flange diameter是什么意思 Flange swing check valve Bland Flange是什么意思