HB 3877-1986 内螺纹第Ⅱ系列工艺底孔用针式量头单头止端光滑塞规M1~M3.pdf

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HB 3997-1987 内螺纹小径用针式量头单头止端光滑塞规 M1~M3.pdf

HB 3876-1986 内螺纹第Ⅰ系列工艺底孔用针式量头单头止端光滑塞规M1~M3.pdf

HB 3997-1987 内螺纹小径用针式量头单头止端光滑塞规 M1-M3.pdf

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