泵房着火时,首先应()。A、报警B、自己先灭火C、停止机器运行...
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Friday, October 13, 2023
Friday, October 13, 2023
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在不发生相变和化学反映的前提下,纯物质因温度的变化而吸收或放出的热量称为潜热。...
Thursday, March 21, 2024
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润滑油具有润滑,密封,减振,卸荷和防锈等作用,不具有冷却冷却作用。...
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单位质量的某种气体在一定压力下变成同温度的液体时所放出的热量叫做该气体的汽化热。...
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对纯物质而言,其沸点是随着外界压力的变化而改变的。当外界压力增大时,沸点降低。...
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同一种原油的馏份油,馏份越窄,含地蜡越少,油收率越高。...
Tuesday, March 19, 2024
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