The current position:

Air breathing apparatus

release time:2015-12-14 09:12
1 The guideline applies to the positive-pressure fire-fighting air breathing apparatus used by the ship fireman to avoid the inhalation of harmful poison gas, smog, and noxious pollutant suspended in the air or used in the oxygen-deficient environment.
2 It does not apply to the oxygen air breathing apparatus, diving breathing apparatus, negative pressure ventilator and positive-pressure fire-fighting air breathing apparatus with air supplied externally.
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