expansionsn.扩展(expansion的复数形式)
expansionn.膨胀;扩展;扩充
expansion furnace前置炉膛
expansion turbine膨胀涡轮
expansion mandrel胀开心轴,可调式心轴,可胀式心轴
expansion bellows胀缩盒
expansion of soil挤土
expansion cistern膨胀水箱
expansion opening膨胀室
expansion of arch牙弓扩张
expansion sponges膨胀海绵
expansion bearing活动支承