基本解释n.[机](轴颈罩的)顶盖同根派生 英汉例句Slide assembly back into fork. Replace screw in bottom of leg. Pour oil back in the fork. I used a nylon washer to cushion the spring topcap contact area. 将其装回前叉，拧上底部螺丝，倒回前叉油。我着了个尼龙垫圈（下图白色垫圈）垫在与盖子接触部分