Yin Yu

Drill bit assembly of engineering driller

Hydraulic engineering driller

Manufacture method of high-intensity and lightweight paper honeycomb composite board for vehicles

But motor vehicle power take off mechanism of parking stopping

Light weight paper honeycomb composite board with high-viscosity hot melt adhesive membranes

Parking locking device used in vehicle transmission and transmission utilizing same

Utensil ends derailleur of contrary function

Little-odor and few-VOCs (volatile organic compounds) automotive paper honeycomb composite board and dry-method forming process thereof

Two grades of variable -speed drive(VSD) assemblies on tricycle

Aramid paper honeycomb sandwich composite structure with high strength and light weight