国家/地区 中国（2）
IPC部 F（2）
IPC大类 F16（2）
IPC小类 F16L（2）
IPC
发明人 ZHANG D（2）
公开年 2023（2）
申请年 2022（2） 
专利权人

Stainless steel clamp check valve e.g. reflux valve, has sleeve rod whose end passes through inner part of mounting pipe and is connected with graphene block, where inside of graphene block is embedded with electric heating block.

ZHANG D, LIN S, ZHANG B

Cold-resistant and low-temperature resistant metal hose used in aviation, aerospace, petroleum, chemical engineering, metallurgy, electric power, paper making, wood, textile, construction, medicine, food, tobacco, and transportation.

ZHANG D, HUANG R, CHEN S