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發表於:2016-12-21
Butthemostunfortunatearethosewhoserevolutionshavesucceeded.Allrevolutionshithertohavebeenrevolutionstoprotectonekindofpropertyagainstanotherkindofproperty.Mostcountriesha...
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發表於:2018-02-11
Thewholedrumrotatesatasteadyspeedofaboutsixtyrevolutionspersecond.Theshaftanddiscsrotateataboutfortyrevolutionspersecond....
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發表於:2018-10-15
revolutionsperminuteaspeedof100revolutionsperminuterevolutionsperminute(espasameasureofenginespeed)Theyspinat400-500revolutionsperminute.Thedrumisrotatedat20revolutionspe...