HB 3490-1985 不通孔用套式扩孔钻d=25~80mm.pdf

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HB 3490-1985 不通孔用套式扩孔钻 d＝25～80mm.pdf

HB 3490-1985 不通孔用套式扩孔钻 d＝25~80mm.pdf

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