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曲轴磨削加工自动线在1960年之前已先后在美国、英国、西德、法国和日本等国家汽车厂采用。如1955年左右,美国诺顿(Norton)公司(该公司1972年已并入美国瓦诺·斯瓦塞
Crankshaft grinding automatic lines in 1960 have been in the United States, Britain, West Germany, France and Japan and other national auto plant used. As around 1955, the United States Norton (Norton Company (the company 1972 has been incorporated into the United States,