常见例句Mechanical propert ties.Longit tudinal and shear vibrat tion. 参考名称: Met thods of test ting plast tics.Elect ric mo to rs are smaller and cleaner, and operate w ithless no ise and vibrat ion. 电动机比较小,较干净,而且运转进声音和振动较小。 返回 vibrat-