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根据滚动轴承的______公差与______精度，GB/T 307.3—2005把向心轴承分为______五级。其外圈与外壳配合应采用______制，内圈与轴颈配合应采用______制。若轴颈选用m6公差带，则内圈与轴颈的配合性质为______配合。
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【简答题】Mrs. Tang died two days ago. Now Mr. Tang feels very l2_________,because he lives a_______ . My father ________ ________ (发脾气) easily. We didn't climb the mountain _________ __________ (由于...
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