Japan buys much of its rare metal from China to feed its electronics and car industries.
日本从中国购买稀有的金属向国内电子工业和汽车工业提供生产原料。
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The conditions which have an important influence on metal cutting are work material, cutting tool material, cutting tool geometry, cutting speed, feed rate, depth of cut and cutting fluid used.
The purpose of this is to feed the molten metal to the mold cavity as the molten metal solidifies and shrinks, and thereby prevents voids in the main casting.