国家/地区
IPC部 B（2）
IPC大类 C11（2）
IPC小类 C11D（2）
IPC
发明人
公开年 2021（2）
申请年 2019（2）
专利权人

Cleaning steel pipes involves using high-pressure gas pulse to flush the cleaning liquid into the pipeline to be cleaned, and introducing ultrasonic waves.

LI R

Improved water soluble film used to make packaging film, comprises water soluble films batch i.e. prepared by mixing e.g. water soluble resins, plasticizers and fillers and mixing water soluble film batch with graphene nanoparticles.

PATEL S P