WN-FF-带颈对焊钢制管法兰

WN-FF-Weldneck Flange

WN-RF-带颈对焊钢制管法兰

WN-RF-Weldneck Flange

WN-MF-带颈对焊钢制管法兰

WN-MF-Weldneck Flange

WN-TG-带颈对焊钢制管法兰

WN-TG-Weldneck Flange

WN-RJ-带颈对焊钢制管法兰

WN-RJ-Weldneck Flange