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    A. The instruments manual: projection is like standing at attention like; Digital type rotary screen glass, convenient measure; Reflection variable Angle, lighting for standard equipped with; Can provide automatic edge finder, the function such as electric focus; Objective to tower bridge, can also put three objectives.

    B.  Precision: 0.001 mm and 0.01 °; The biggest travel: 200 * 100;  The biggest truck: 15 kg.

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