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精密压力表主要用于检验工业用普通压力表,也可用于精密测量对铜和钢及其合金不起腐蚀作用的液体、气体和蒸汽的压力.

解答:

The vernier gauge mainly uses in examining the industrial used ordinary pressure gauge, may also use in the precision measurement does not play the corrosive action to the copper and the steel and the alloy the liquid, the gas and the steam pressure.