Бал чулуун роторыг хэрхэн зөв ашиглах вэ
How to use graphite rotor correctly 1. Preheating before use: the graphite rotor shall be preheated at about 100mm above the liquid level for 5min ~ 10min before immersion in aluminum liquid to avoid the impact of Quench on raw materials; The rotor must be filled with gas before immersion in liq...