这些丝锥比同尺寸的常规手用丝锥要短些，但是设计参数相同，他们适应手用或者机用攻丝。
These taps are shorter than a similar size of regular hand tap, but the design features are the same, They are suitable for hand or machine use.
这些丝锥比同尺寸的常规手用丝锥要短些，但是设计参数相同，他们适应手用或者机用攻丝。
These taps are shorter than a similar size of regular hand tap, but the design features are the same, They are suitable for hand or machine use.
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