a bell-shaped glass cover used to protect and display delicate objects or to cover scientific apparatus or to contain gases 同义词：bell glass,
例句与用法
1.
The bell jar is an autobiographical novel written by sylvia plath 摘要《钟形罩》是普拉斯的自传体小说。
2.
Bell jar testing 钟罩试验
3.
Vacuum bell jar 真空钟罩
4.
Hermione stupefies him , and he falls headfirst into the bell jar , his head turning into a baby ' s 赫敏击昏了他，他头朝前地倒进了钟形玻璃罐，他的头变成了婴儿的头。
5.
" we put them in a bell jar overnight and allowed them to be slowly moistened , " he explained “我们头一天晚上就把它们放在一个钟形的玻璃容器里面，让它们慢慢变湿。 ”他说。
6.
If air weren ' t admitted into the bell jar , the electric bell in the bell jar would not ring because of a lack of a medium 如果我们不让空气进入铃罩，铃罩中的电铃一定会因缺少介质而不响了。
7.
Feeding mechanism : bucket hoisting and manual double bell jar feeding mechanism is adopted , which is easy to operate and can prevent gas leakage efficiently 加煤机构：采用斗提卷扬机构，手动双钟罩加煤装置，操作简便、能有效防止煤气泄漏。
8.
Feeding mechanism : up roller , middle flashboard and down bell jar or double bell jar feeding mechanism with hydro - automatic drive , featured as easy operation , convenient maintenance and good air - tightness 加煤机构：液压驱动自动加煤装置，采用上滚筒中插板下钟罩机构或双钟罩结构，操作简单，维修方便，气密性好。
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