国家/地区 中国（2）
IPC部 B（2）
IPC大类 B05（2）
IPC小类 B05B（2）
IPC B05D005/00（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

Preparing high-wear-resistant high-chromium graphene roll skin, comprises e.g. premixing resin, chromium, graphene, plasticizer, glidant and additives in inner cavity, melt extruding, slicing, performing iron-based phosphating pretreatment and spraying surface of roller skin by sandblasting machine.

WUMING, WANG T