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