承插焊法兰 socket welding flange ; SW ; SOCKET WELD

承插支管台 sockolet

承插焊端 socket welding end

承插焊接 socket weld ; SW

承插焊的 socket welded

承插连接 bell and spigot joint

承插焊 SW ; socket-weld ; sock welded

承插焊连接 socket welded joint ; Socket welding flange SW

承插管 socket pipe ; spigot and socket pipe ; Spigot And Faucet Pipe ; Screw and Socket Steel Tubes