接管內徑千分尺

1.用于內徑尺寸測量  For inside measuring. 
2.精密接長管可保證精度不受旋合力大小變化的影響   Precision rods can gurantee the accuracy of measurement be free of the influence of threads resultant of forces.
3.可根據用戶要求提供各種尺寸的內徑千分尺   Different sizes of internal micrometers can be supplied upon request of customers.
4.精度指標：按相應國家標準   Accuracy:According to China national standard.

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