持续工作时间 meaning in Chinese

continuous working period

The hand - held , battery - powered ( endurance 6 . 5 hours ) diver reconnaissance system ( drs ) is a further development of a prototype system built under an applied research package for shallow - water mine - countermeasures ( mcm ) diving
做了进一步改进的手持式潜水员侦察系统采用电池电源（持续工作时间6 . 5小时），其原型系统是为浅水区反水雷潜水并在对成套设备进行应用研究的基础上制成的。