gas helmet

基本解釋

The helmet is made of a small, helium gas cylinder with special motion sensors.
頭盔由帶特殊的運動傳感器的小氦氣筒組成。
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Purchased key Labor Protection Articles, such as Safety Helmet, Anti-gas Aspirators must have label of safety assessment.
所采購的關鍵勞動防護用品如安全帽、防毒口罩等必須有安鑒字樣的標簽。
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All the competitors must supply their own safety equipment and must wear a helmet. Gas and electric powered bikes are not permitted.
參賽者自備參賽車輛、裝備與護具，所有車輛不得配有任何非人力傳動、助動裝置。

Then he donned a police-style helmet and body armor, tossed a gas canister into the theater crowd and opened fire, prosecutors said.
NPR: Colo. Judge Enters Not Guilty Plea For Holmes