国家/地区 中国（2）
IPC部 B（2）
IPC大类 B29（2）
IPC小类 B29B（2）
IPC
发明人
公开年 2022（2）
申请年
专利权人

Plate heat exchanger unit comprises base and multiple positioning rods arranged on base, where positioning rod is provided with top plate, and heat exchange space is provided between top plate and base, and heat exchange space is provided with multiple groups of first heat exchange plate.

LI Y

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