They aided the rich to fix the machine.
他们帮富人修理机器了。
With machine tools as an example, a concept for a computer-aided product development is illustrated.
以机床为例，介绍了一个计算机辅助产品开发的方案。
With machine tools as an example, a concept for a computer-aided product development is illustrated.
以机床为例，介绍了一个计算机辅助产品开发的方案。
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