fire hydrant
消火栓
消防龙头
消防街井
消防栓
救火水龙
消防给水栓
消防栓、消防龙头
Reduced and constant voltage fire hydrant
spacing of fire hydrant
The room before the fire hydrant elevator
dry (semi-dry) process of technology
Dry and Semi-Dry Desulfurization Residues
dry grinding dry burning