Air respiration shield is made by ploy carbonic acid injection material for its looking glass, so it does not allow wide range of eyesight but also no easy to break but to use.

• 空气呼吸面罩采用聚碳酸脂材料注塑料而成的台柱面窗，不仅视野大，而且有良好的透光性，强度高，牢固耐用。