HB 3880-1986 内螺纹第Ⅱ系列工艺底孔用圆锥尾量头单头止端光滑塞规 M3.5～M40.pdf

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HB 3999-1987 内螺纹小径用圆锥尾量头单头止端光滑塞规 M3.5~M40.pdf

HB 3879-1986 内螺纹第Ⅰ系列工艺底孔用圆锥尾量头单头止端光滑塞规M3.5~M40.pdf

HB 3880-1986 内螺纹第Ⅱ系列工艺底孔用圆锥尾量头单头止端光滑塞规M3.5~M40.pdf

HB 3999-1987 内螺纹小径用圆锥尾量头单头止端光滑塞规 M3.5-M40.pdf

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