| 1. | The use and maintenance of petroleum well - logging cable
石油测井电缆的使用与维护 |
| 2. | The operating and maintenance of petroleum workover rig
石油修井机使用与维护 |
| 3. | Operation and maintenance for magnetotelluric instruments
大地电磁测深仪使用与维护 |
| 4. | Management regulation for operation and service of equipment
设备使用与维护管理制度 |
| 5. | Use and maintenance of conventional peophone ' s
陆用数字地震检波器使用与维护 |
| 6. | Light weight gas turbine operation and maintenance
轻型燃气轮机使用与维护 |
| 7. | Use and safeguard of coal mine electric cable
矿用电缆的使用与维护 |
| 8. | Using and protecting 9mm police revolver
警用转轮手枪的使用与维护 |
| 9. | The use and maintenance of ups power supply
电源的使用与维护 |
