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

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 forging steel flange是什么意思 Steel Wire Rope in PVC steel steel steel steel President Hu i_____ Lian Zhan in Beijing. they are new in mr hu's 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 current iron and steel industry in current iron and steel industry in blind flange of sus304 material shall be fitted blind flange of sus304 material shall be fitted in-way-of connections for portable tank cleaning machine. 英语翻译一个外国客户的询盘是：I'm interested in your metal channel,steel channel,steel profile .请帮忙翻译一下metal channel,steel channel,steel profile是什么意思? Please enter your Hu Kou in Chinese 怎么填