Only valves such as packless diaphragm or bellows type should be used.

只能使用无衬垫膈膜阀或管阀。

We could hear he was bellowing commands to his troops.

我们听见他正向他的兵士大声发布命令。

The wounded tiger bellowed out.

受伤的老虎咆哮着。

Two or more folds parallel to each other with adjacent folds in opposite directions, resembling the bellows of an accordion. Alternative term: fanfold.

两个(以上)的平行摺以不同边方连接，类似手风琴的腔。