短語詞組短語bell and spigot faucet 承插口bell and spigot offset 承插式乙字管bell and spigot tee 承插式三通bell and spigot reducer 承插式大小頭bell and spigot frame 承插結(jié)構(gòu)bell and spigot joint 承插連接;插承接合;[機]套筒接合;套接頭bell and spigot bend 承插式彎頭bell and spigot cross 承插四通bell -and-spigot 套筒接頭 返回 bell and spigot