经常有煤矿发生安全事故的新闻见于报端,因此,我想给矿工发明一种新型的安全帽。这个帽子里面有多种测定器,比如地震测定器能扫描矿井里面煤层的情况,当煤层松动,有坍塌危险时,能发出警告;又比如里面有气体测定器,能准确测定矿井里面一些有毒、易燃气体的含量,如一氧化碳等, The news of frequent accidents in coal mines is found in the newspapers. Therefore, I want to invent a new type of helmet for miners. There are many kinds of measuring devices in this cap. For example, the seismometer can scan the coal seam inside the mine. When the coal seam is loose and there is danger of collapse, it can give a warning. In addition, there is a gas detector inside, which can accurately determine some toxic inside the mine. The content of flammable gases, such as carbon monoxide, etc.