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expanding drawing
释义
expanding drawing
Encyclopedia
工学
管材拉拔
释
expanding drawing
扩径拉拔
用小直径的管坯生产大直径管材的拉拔方法。生产过程是将扩径芯头装入直径较小的管坯中拉拔。
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Calabrian Stage
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calbtun
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calcareous spar, calc-spar, calcite
calcareous sponge
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