In 1961, the Beijing second machine tool plant began using gas nitriding quenching.
1961年，北京第二机床厂开始采用气体氮化淬火。
But I'm afraid Qinghua and Beijing Universities can't be run along these lines. By no means should all colleges and universities follow the example of the Shanghai Machine Tool Plant.
但是清华大学、北京大学恐怕不能这样办，并不是所有大学都要走上海机床厂的道路。
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