A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
RETURN GAS PREVENTION DEVICE FOR DRAINAGE PIPE
The present disclosure provides a return gas prevention device for a drainage pipe, belonging to the technical field of drainage pipes. The device realizes two functions of water seal and a check valve simultaneously, as well as prevents gas channeling in a drainage process.
RETURN GAS PREVENTION DEVICE FOR DRAINAGE PIPE
The present disclosure provides a return gas prevention device for a drainage pipe, belonging to the technical field of drainage pipes. The device realizes two functions of water seal and a check valve simultaneously, as well as prevents gas channeling in a drainage process.
RETURN GAS PREVENTION DEVICE FOR DRAINAGE PIPE
ZHANG YULIAN (author) / ZHANG CHEN (author) / ZHANG HAI (author) / WANG QIN (author)
2021-01-21
Patent
Electronic Resource
English
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