hydrantn.给水栓;水龙头;消火栓
hydrant stainless steel消火栓系统
hydrant-fuel dispenser加油车
hydrant refuelling system加油栓加油系统
hydrant-flow calculation消防流量计算
hydrant water supply system消火栓给水系统
hydrant and extinguisher cabinet消火栓和灭火器箱