| 1. | Our model is easy to operate and maintain .
我们这个型号（的机器）很容易操作和保养。 |
| 2. | Protocols that must be followed exist for operating and maintaining airplanes
原则必须依循现有状况来操作维护飞机。 |
| 3. | Dwr operates and maintains the state water project , including the california aqueduct
描述:水资源部门执行并监督国家的水工程，包括加利福尼亚沟渠。 |
| 4. | The machine , with pleasing appearance and stable accuracy , can be operated and maintained conveniently
机床外形美观大方，精度稳定可靠，操作维修方便。 |
| 5. | Echl operates and maintains the system round the clock and provides a help desk for subscribers
Echl负责二十四小时操作和管理该系统，并提供用户求助台服务。 |
| 6. | Adopts full frequency conversion speed adjustment ， operate and maintain conveniently ， stably performance
全变频器无级调速，设计科学合理，操作维护方便，性能稳定。 |
| 7. | The website is operated and maintained by the national institute of standards and technology of the us government
：这网站由美国政府的全国标准及科技学会负责运作及维持。 |
| 8. | Relatively cheap cost of investment , operate and maintain and safeguard simply , the daily operation expenses are low
相对低廉的投资成本，操作保养维护简单，日常运作费用低。 |
| 9. | Please operate and maintain the hoist in accordance with the : " peration & maintenance manual of nhss wire rope pulling hoist "
请按照" nhss型钢丝绳手扳葫芦使用维护说明书"使用维护。 |
| 10. | Metre approach road , is operated and maintained by the discovery bay road tunnel company limited , which also built it
米的接驳道路组成，并由愉景湾隧道有限公司建造、保养和营运。 |
