Parallel shank twist drills—Part 2:The types and dimensions for parallel shank stub series twist drills and parallel shank jobber series twist drills
MOD ISO 235:1980
全国刀具标准化技术委员会(SAC/TC 91)
GB/T 6135的本部分规定了直柄短麻花钻和直柄麻花钻的型式和尺寸。
本部分适用于直径0.20 mm～40 mm的直柄麻花钻。
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