龙岩Half nipple
龙岩Nipple
龙岩Long nipple
龙岩Half thread long nipple
龙岩Hexagon nipple
龙岩Hexagon F/M nipple
龙岩Hexagon reducer nipple
龙岩Hose nipple L-type
龙岩Hose connector whj
龙岩Hose connector WHS
龙岩Hose joint WRH for welding
龙岩Round water pipe joint wrhn
