HB 4542-1992 MJ内螺纹第Ⅰ系列工艺底孔用套量头双头光滑塞规MJ42~MJ80.pdf

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HB 780-1973 1~8级精度用套量头双头光面塞规D30~80mm.pdf

HB 4546-1992 MJ内螺纹第Ⅱ系列工艺底孔用套量头双头光滑塞规MJ42~MJ80.pdf

HB 4542-1992 MJ内螺纹第Ⅰ系列工艺底孔用套量头双头光滑塞规 MJ42～MJ80.pdf

HB 4546-1992 MJ内螺纹第Ⅱ系列工艺底孔用套量头双头光滑塞规 MJ42～MJ80.pdf

HB 780-1973 1~8级精度用套量头双头光面塞规 d＞30~80mm.pdf

HB 4542-1992 mj内螺纹第Ⅰ系列工艺底孔用套量头双头光滑塞规 mj42~mj80.pdf

HB 4546-1992 mj内螺纹第Ⅱ系列工艺底孔用套量头双头光滑塞规 mj42~mj80.pdf

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