... 1. Professional manufacturer 2. Metal machining part for speed reducer house 3. Machining Center, CNC milling, CNC turning Hefei Bolin ... working parts. This metal machining part for speed reducer house is made in-house. Our processing capacity:1. Equipment: Machining Center, ... etc.2. Heat treatment: Carburizing and quenching in house,3. Steam treatment in house.4. Material: Cast iron, Carbon steel, ...