Then the Yan fly the in general use space passage of closing oneself and open the in general use space passage of unmanned machine of sea surface, the sea water of in general use inside all dump go out, then close the in general use space of unmanned machine.The liquidity of sea water is stronger than Huang Sha, so the Yan flies operation time of completing a circulation shorter, just spend time for a minute.And because two in general use space passages be separated distance very short, so…