问题
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One end of a cylinder for a medium or high-speed diesel engine is sealed by the piston and
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Which is NOT one of the difficulties with coffee as a medium?A.It is of sticky and elastic
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Pumps and fine filters are arranged _____ with one as standby.A.in duplicateB.in doubleC.a
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The majority of medium speed and high speed marine diesel engines for main or auxiliary dr
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medium filtration
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disperse phase and disperse medium