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【单选题】
A 230-m 3 rigid tank is filled with saturated liquid-vapor mixture of water at 120 ° C. If 25% of the mass is liquid and the 75% of the mass is vapor, the total mass in the tank is ( )A.
252 kg
B.
824 kg
C.
344 kg
D.
230 kg
E.
683 kg
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A.
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B.
friction device
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D.
hydraulic device
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A.
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A.
internal expanding-shoe
B.
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