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An attempt has been made to follow the scientific and technological steps associated with the production of fine grained hardmetal.

回顾硬质合金材料的历史发展和现状的基础，介了域中海材料研究所取得的典型实际成果及工业应用概况。

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come over, come over sb, come round, come sth to light, come this way, come through, come to, come to hand, come to life, come to light,

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3G, 401(K), a,

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