hydrantn.给水栓；水龙头；消火栓hydrant gate消火栓门阀hydrant pipe消防水管hydrant drain消火栓泄水装置hydrant valve消防龙头阀hydrant house消防器材房hydrant cover消火栓盖hydrant wrench消火栓扳手hydrant barrel消火栓筒hydrant system消火栓系统hydrant nipple消火栓丝口铜出口