Air chambers are usually fitted to reciprocating pumps in order to ().
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() usually helps to induce air movement to assist combustion.
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The three basic parts of any eductor are the nozzle, the suction chamber, and the ().
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Air line lubricators are used in compressed air systems to lubricate ().
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On small, low pressure, air compressors, the cylinders are usually lubricated by the ().
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Operating conditions in the crank chamber are very () those in the cylinder.
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Each cylinder has one starting valve which is usually opened by air pressure and closed by ()
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Anticyclones are usually characterized by().
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To obtain maximum efficiency, two stage air compressors are usually ().
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The pressure of pilot air is usually () than that of starting air.
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The starting air system usually has () to prevent starting if anything is not in order.
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Air receivers installed in starting air systems are to be ().
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Usually we take the cooling effect of the air flown through the cylinder during the overlap period as()
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Minor supporting ideas are usually( )?
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Apartments are usually used in America, while ______ are usually used in UK.
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Business appointments are usually very formal.
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Chambers are traditionally located in ( ).
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Concert tickets usually are discrimination pricing. ( )
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Usually,an Air Waybill is non—negotiable,that is,the goods must be sent to the consignee titled in the Air Waybill.()
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In international air cargo transportation, SpecificCommodity Rates are usually lower than General Cargo Rates.()
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An air waybill usually contains 10 sheets,3 fororiginal,6 for copies and 3 for extra copies.Theoriginalsdescribe the carrying clauses on their back.()
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Usually, the AWB is non-negotiable, the goods must be sent to the()titled inthe air waybill.
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Usually, the AWB is non-negotiable, the goods must be sent to the()titled in the air waybi
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f you travel by air across the center of Africa or South America, you fly over forests for thousands of kilometers. 如果你坐飞机旅行穿越非洲中部或者南美洲,你就飞过了上万公里的森林。These great forests are the oceans of trees. There are thousands and thousands of different kinds of
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