国家/地区 中国（3）
IPC部 B（3）
IPC大类 B29（3） F16（2）
IPC小类 B29B（3）
IPC
发明人
公开年 2021（2）
申请年 2021（3）
专利权人

Polybutylene composite pipe used in hot spring transportation, comprises anti-corrosion outer layer, thermal insulation layer and working inner layer from outside to inside, where working inner layer is made of polybutene material and insulation layer is made of polyethylene foamed plastic.

QIN X, YI Z, WANG L, JIN J, LIANG Y

Modified extruding device for preparing graphene color master batch, has bearing seat whose inner part is provided with shaft rod whose surface is fixedly installed with multiple fan blades.

HUANG C, CHEN W

Heat-resistant polyether ether ketone ball valve seat comprises polyether ether ketone resin powder, inorganic filler, silane coupling agent, and aluminum dihydrogen phosphate.

JI Q