配方类型：	METALS AND THEIR TREATMENT
配方说明：	High-Density Powder-Metal Alloy (U.S. Patent 2,491,866)
配方组成：	Beryllium/0.25 Tungsten/99.00 Platinum/0.50 Nickel/0.25
配制方法：	Mix these in fine powder form, sinter, and press, using regular powder-metallurgy methods to give a product having a density of 19.3 g. per cc.

返回数据库查询