bell end,flare是什么意思

网络释义

1)bell end,flare,钟口2)Gunzhongkou,滚钟口3)Minute Talk,四、三、二分钟口语练习4)bell and spigot joint,"钟口式接头,承插式接头"5)bell and flange joint,钟口一法兰连接接头

The evaluation and subsequent exploitation of tourism resources at Gunzhongkou of Helan Mountain;

贺兰山滚钟口旅游资源评价及深度开发构想