配方类型：	METALS AND THEIR TREATMENT
配方说明：	Foundry-Core Binder (U.S. Patent 2,861,893)
配方组成：	Water/1.5 Sand (60-120 Mesh)/95.0 Sugar/0.8 Sodium Silicate/2.7
配制方法：	The cores are exposed to carbon dioxide gas for 4 to 5 minutes for hardening. This gives increased compressive strength.

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