HB 2393-1977 HB242-70螺纹通端环规.pdf

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HB 2392-1977 HB242-70螺纹通端环规.pdf

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HB 2402-1977 HB242-70螺纹通端环规及其校对塞规应用尺寸.pdf

HB 7005-1994 30'。渐开线花键综合通端环规m=0.5~4,D=5~150.pdf

HB 7005-1994 30°渐开线花键综合通端环规.pdf

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HB 2402-1977 hb 242－70 螺纹通端环规及其校对塞规应用尺寸.pdf

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