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上海汽轮机厂铸工姚国钧,根据清理铸件用的冷泵喷砂器的吸砂原理,创造了一种简单的冷泵吸砂器(如图)。这种吸砂工具的构造很简单,只要在压缩空气的皮带管
Yao Guojun, a castor at Shanghai Steam Turbine Works, created a simple cold pump suction device (pictured) based on the sand suction principle of a cold pump sandblasting machine used to clean castings. The construction of this suction tool is simple as long as the belt tube is compressed air