single duty

Single acting by duty spring return.

单作用,重型弹簧回缩.

Judging a contest with a single eye; a single devotion to duty; undivided affection; gained their exclusive attention.

专心的断案；对职责的专心致志；专一的爱；得到了他们专门的注意。

As the most common anti-theft alarm, gas leak warning, fire alarm systems, their functions are too single and have a serious flaw-can not remote real-time automatic alarm, the guards on duty have to timely discovery of unusual circumstances.

而作为最常见的防盗报警、燃气泄漏警示、火灾报警系统，它们的功能单一并且有着严重的缺陷&不能远程实时自动地报警，并且需要值班人员的看守来及时地发现异常情况。

Manual actuator stems are single lead stub acme threads with one piece duty clip welded on.

手动执行器轴是单导短梯形螺纹,带一件重型焊接夹子.