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...Instruction manual self contained compressed air operated breathing apparatus model rhzk jiangsu huayan marine equipment co ltd foreword please read the whole directions carefully before using in order to skillfully master its performance principle and use method only when which is properly it can well maintained constantly work prolong service life so very important maintain as renewal of fast will be revised with we not give further notice about details revision contents chapter general introduction main index structure technical note cylinder valve pressure reducer alarm whistle backboard gauge supply full face mask medium pipe quick connector checking for dispose after check maintenance routine attention fault defection solution complete ser transportation storage spare parts application hereunder shortened a new supporting open respirator widely used fire fighting chemistry industry vessels petroleum smelt mine high respiratory protective device designed fireman special trained pe...