配方类型：	METALS AND THEIR TREATMENT
配方说明：	Foundry Sand Additive (U.S. Patent 2,848,338)
配方组成：	Powdered Charcoal (80-200 Mesh)/70-75 Fuel Oil (Fl. Pt. 120-180F.)/25-30
配制方法：	0.5-1.5% of above is added to coat particles of foundry core sand.

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