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。
Hebei Dongfeng Forming Machinery co., Ltd., the predecessor of Hebei is forging machine tool plant, built in 1956, 1998 conversion to joint-stock enterprises.
河北东风锻压机械有限公司的前身是河北锻压机床厂,始建于1956年,1998年改制为股份制企业。
Hebei Dongfeng Forming Machinery co., Ltd., the predecessor of Hebei is forging machine tool plant, built in 1956, 1998 conversion to joint-stock enterprises.
河北东风锻压机械有限公司的前身是河北锻压机床厂,始建于1956年,1998年改制为股份制企业。
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