air bell

• 气钟

air bell的用法和样例：

例句

1. This bronze bell dates from the 16th century.
   这口青铜钟是在十六世纪制造的。
2. A pull on the rope will make the bell ring.
   一拉绳子钟就响。
3. Between the fibers are many small pockets of air.
   纤维之间有很多小气泡。
4. Methods were proposed to prevent air entrain-ment.
   同时提出了充模过程中防止气泡卷入的措施。