问题
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A.useB.heatC.pressureD.form
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A.pileB.heatC.powerD.pressure
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Pressure Cooker (压力锅) Safety When you are cooking with a pressure cooker, you should le
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The pressure range between the system cut in and cut out pressures in a refrigeration unit
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Every liquid has a pressure at which it will vaporize and this pressure varies with temper
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A.standardB.recordC.limitD.pressure