国家/地区 中国（2）
IPC部 B（2）
IPC大类 B05（2） C09（2）
IPC小类 B05D（2）
IPC B05D007/22（2）
发明人
公开年
申请年 2022（2）
专利权人

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

Modified spraying material used in non-stick material and cooker, comprises spraying material which forms outer layer of particles, and fluorinated carbon material which is wrapped in interior of spraying material.

ZHANG M, YUAN H, LI C, QU Y