【简答题】确定φ50H7/g6配合中孔与轴的极限偏差,基准制,及配合关系。(已知:公称尺寸为50mm公差等级IT6为0.016mm,IT7为0.025mm。基本偏差代号g,其相关数值为-0.009mm) 填空:孔φ50H7 ES= mm, EI = mm 轴φ50H7 es = mm,ei = mm 基准制: 配合关系:
【简答题】Elderly s who regularly drink green tea may stay more active and independent than their peers over time,according to a Japanese study that covered thousands of people. Green tea contains antioxid...
【简答题】阅读理解。 Elderly s who regularly drink green tea may stay more active and independent than their peers over time,according to a Japanese study that covered thousands of people. Green tea contains an...