配方类型：	METALS AND THEIR TREATMENT
配方说明：	Foundry Sand Core Coating (U.S. Patent 2,809,117)
配方组成：	Water/To make 30-35 Be. suspension Calcium Oxide/35.5-36.5 Magnesium Chloride/9 Graphite/107-109 Magnesium Oxide/6-6.25

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