FF-平面整体钢制管法兰

FF-Integral steel pipe Flange

RF-突面整体钢制管法兰

RF-Integral steel pipe Flange

MF-凹凸面整体钢制管法兰

MF-Integral steel pipe Flange

TG-榫槽面整体钢制管法兰

TG-Integral steel pipe Flange

RJ-环连接面整体钢制管法兰

RJ-Integral steel pipe Flange