Sometimes it is electric and you push a button to make it ring.

有时它是电的，而且你推动一个钮扣使它响。

youdao

And then push sealing ring and clamp ring;

再推密封圈、锁紧圈；

youdao

A push button extends into the end ring and has a lens cap.

一个按钮伸进该端环，并具有一个透镜盖。

youdao

A push button extends into the end ring and has a lens cap.

一个按钮伸进该端环，并具有一个透镜盖。

youdao