FF-平面钢制管法兰盖

FF-Blind Flange

RF-突面钢制管法兰盖

RF-Blind Flange

MF-凹凸面钢制管法兰盖

MF-Blind Flange

TG-榫槽面钢制管法兰盖

TG-Blind Flange

RJ-环连接面钢制管法兰盖

RJ-Blind Flange