explosive gas indicator

例句：

1. 1. The engineer used an explosive gas indicator to detect the presence of dangerous chemicals in the factory.
   工程师使用一种爆炸性气体指示器来检测工厂中危险的化学物质的存在。
2. 2. The firefighters used an explosive gas indicator to alert the public about the potential danger posed by the fire.
   消防员使用一种爆炸性气体指示器来警告公众关于火灾可能带来的潜在危险。
3. 3.The company has installed several explosive gas indicators in its manufacturing plants to ensure compliance with safety regulations.
   该公司在其制造厂安装了多个爆炸性气体指示器，以确保遵守安全规定。