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市场上买到的千分表架,使用时不能保证千分表的触头与被测量件表面有良好的接触,往往要多次敲打支承杆,才能达到理想的位置。这样不但费时间,
The commercially available dial gauge holder does not guarantee good contact between the contacts of the dial indicator and the surface of the part to be measured. It is often necessary to beat the support bar repeatedly to achieve the desired position. This will not only take time,