They are widely used in vessel, oil, electric power, chemical, metallurgy, mine, city drain department etc.

广泛应用于船舶、石油、电力、化工、冶金、矿山、城市供排水部门等。

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They are widely used in vessel, oil, electric power, chemical, metallurgy, mine, city drain department etc.

广泛应用于船舶、石油、电力、化工、冶金、矿山、城市供排水部门等。

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