Distribution Machine 1. single-beam dual-lens system ... , tungsten, magnesium, copper, other rare metal and alloys.c. Other application such as catalyst, cement, abrasive, pharmaceutical, ... by human factor, improving the accuracy of test. c. Calibration accuracy: all instruments are passed after ... stepping motor, precise guide screw, lead screw, connecting axle, and controller, the shortest step is 1.3 ...