钟口坐落在山东菏泽市与河南商丘市中间是山东曹县的一个开发区原曹县普连集镇的一个大队,地理位置好人口密集交通发达公司企业丛生……
把管端做成钟口状可使气流更畅通。
Belling out the end of the tube will permit a freer passage of air.
钟的各部位都有着特定的名称，上部称为钲，下部谓之鼓，钟口两角为铣，钟唇曰于，钟顶名舞。
The bell has a specific name of the site, known as moving the upper and the lower part is called the drum bell mouth 16.20 for milling, bell onthe lips say, Name-minute dance.
乘客只需8分钟就可以走到最远的登机口。
Passengers only need eight minutes to walk to the farthest boarding gate.
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