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一种3D打印的汽车热冲压模具砂芯强度强化的方法

Release Time:2019-03-09  Hits:

First Author: 姚山

Disigner of the Invention: 李鑫,张雪,童强

Application Number: CN201510115689.7

Authorization Date: 2015-03-17

Authorization Number: CN104707940A

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