... 所以1/8=3.175mm當要找1/2時等於4/8等於4x3.175mm=12.7mm|維勳螺絲股份有限公司. ... 1/64″, 0.3969, 1厘25, 47/64″, 18.6531, 5分8厘75, 2-1/8″, 53.9750.
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