Methods: with the HY-6071 type diving equipment of heliox, 21 diviers dived underwater at the 72-80m depths in The East China Sea.

• 方法: 21名潜水员使用我国HY-6071型氮氧潜水装具；在我国东海进行了一次72-80m氦氧常规潜水训练.