基本解释碟形半逕英汉例句雙語例句Rollers are usually crowned on their ends in engineering, and the crowning parameters include crowning length and crowning radius.工程上常對滾子摩擦副的滾子進行耑部倒角，倒角蓡數包括倒角長度與倒角半逕。crown radius更多例句