Caution: The amount of hydrogen gas necessary to produce oxygen deficient atmospheres is well within the flammable range, making fire and explosion the primary hazards associated with hydrogen and air atmospheres.

• 警告：导致空气缺氧的氢的数量在其可燃范围内，这使得起火和爆炸成为了同氢和大气气氛相联系的主要危险。