国家/地区 中国（3）
IPC部 B（3）
IPC大类 B05（3） B08（2） F26（2）
IPC小类 B05B（3）
IPC B08B003/02（2） F26B021/00（2）
发明人
公开年 2022（2）
申请年 2022（3）
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

Rail anti-corrosion spraying device, has main body beam seat fixedly connected with rack, where output end of speed reducing motor extends to inner side of fixing frame, and gear is connected to rack meshing.

DAI D, SU R, YIN Q

Device for spraying graphene material on surface of heat storage body of household electric baking furnace, has drying box provided with multiple electric heating pipes that are set on two sides of heat accumulator fin strip.

ZHENG C