问题
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When the bearing becomes dry from lack of oil, the motor shaft may heat to ______ an extent ______ it welds itself to the bearing.
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The selection of an oil depends _____ on the operating conditions, the design of the engine and the type of fuel to be burned.
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One of the main functions of lube.oil is to remove () from oil cooled pistonsA.powerB.fri
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In 1969, an oil leak polluted the water and ______ the beaches of the southern California
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The ability of an oil to separate cleanly from an oil and water mixture is referred to as
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In cleaning up an oil spill, the use of straw or reclaimed paper fibers would be an exampl
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