国家/地区 中国（2）
IPC部 B（2）
IPC大类 B22（2） C22（2）
IPC小类 B22D（2）
IPC
发明人 LI C（2）
公开年 2021（2）
申请年 2021（2） 
专利权人

Composite material for lift safety protecting system, in which porosity of first porous ceramic preform layer, porosity of second porous ceramic preform layer, porosity of third porous ceramic preform layer, porosity of fourth and fifth porous ceramic preform layer is equal.

CHE J, YIN Y, XUE C, YANG Q, LI C, WANG M, WANG J, GAO K, ZHU W, LI M, LU Y, HE Y

Column wheel used for main reduction system of heavy-duty vehicle, comprises iron, carbon, manganese, chromium, nickel, aluminum, molybdenum, buffer damping mixture and diamond powder mixture.

YI Y, LI J, LI C