钟形套管 喇叭口 托叶鞘 漏斗口的英文

bellmouth

• 钟:    bell
• 形:    form; shape
• 套管:    drivepipe; annular ...
• 喇叭口:    bellmouthing; hydr ...
• 托:    support from under
• 叶鞘:    leafsheath; sheath ...
• 漏斗口:    hopper opening; fl ...