warning gas

Xinhua English reports confirm police used gas, in addition to warning shots being fired.

新华社英文网站报道证实,警察使用了催泪弹, 并且朝天鸣枪.

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。

While the detected gas concentrations are over the warning limit that set before, light and sound alarm signal is generated.

当二氧化碳气体浓度超过预先设定的阈值的时候，就会产生声光报警信号。

The safety identification marks for fuel gas pipeline facilities, such as mark stake, test stake, mile stake, warning board, etc.;

标志桩、测试桩、里程桩、警示牌等燃气管道设施安全识别标志；

The system included a gas explosion early warning subsystem and a case-based reasoning gas explosion subsystem.

其主要包括瓦斯爆炸预警子系统和瓦斯爆炸案例推理子系统。