1. Engineering machinery
Assembly models: excavators, bulldozers, rotary drilling rig, concrete pump truck, loader, shield machine, rock-seizing machine, scraper, road machinery and forklift.

The assembly of parts: cylinder buffer sets of copper, copper sets, four round fuselage joint with Bush, copper sleeve, a triangle bracket arm joint bushing, copper sets back pulley, hanging ears bush.

Characteristics: high bearing capacity, high wear resistance, high stability, resistance to dust, long period of maintenance or maintenance-free.