国家/地区 中国（2）
IPC部 B（2）
IPC大类 B22（2）
IPC小类 B22C（2）
IPC B22D027/04（2）
发明人
公开年 2021（2）
申请年 2020（2）
专利权人

Mold for producing stainless steel butterfly hinge, has graphene heat conducting plate whose inner part is fixed with electric heating wire, and radiating motor whose output shaft is fixedly sleeved with fan blade.

LI X

Aluminum alloy sand casting based heat preservation device has circulating mechanism that is fixedly provided in middle portions of upper and lower ends of heat storage box, and air pipe box that is fixedly installed in heat storage boxes.

MA S