3.75/20

20ni4mo/20ni4moa/g20ni4mo合金钢渗碳轴承钢锻件

(3/5 20% 7/25)x25,15-3.75x10%-5/8

20ni4mo/20ni4moa/g20ni4mo合金钢渗碳轴承钢锻件

5/3.5/3.75

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