国家/地区 中国（2）
IPC部 B（2）
IPC大类 B05（2）
IPC小类 B05B（2）
IPC
发明人
公开年 2023（2）
申请年 2022（2） 
专利权人

Film-making device for preparing graphene heat conducting film, comprises rotating roller whose outer surface is fixed with film-forming base material, heating device and nozzle, where outer surface of rotating roller is used for fixing film-forming base material.

HE Y, TAO X, SUN H, TANG Z, ZHOU B, HAO L

Preparing internal spiral polyvinyl chloride drainage pipe, comprises e.g. bending and spiraling steel wire, extruding, injecting into brushing mechanism, carrying out spiral groove processing, forming inner spiral groove, spraying, extruding, painting and performing preliminary drying.

LIU Z