| 1. | The new winter ventilation system consisted of a perforated plastic tube .
新的冬季通风系统由带孔的塑料管组成。 |
| 2. | The crankcase ventilation system carries fresh air through the crankcase .
曲轴箱通风系统要携带新鲜的空气通过曲轴箱。 |
| 3. | All automobile engines now built are equipped with the positive-crankcase ventilation system of crankcase emission control .
所有现代制造的汽车发动机，都需要装备控制曲轴箱有害污染的曲轴箱强制通风系统。 |
| 4. | The crankcaseventilation system, using a road-draft tube, vented the crankcase vapors and blow-by gas into the atmosphere .
采用行车抽吸管的曲轴箱通风系统，给曲轴箱内的蒸气和窜漏气体排入大气提供了出口。 |
| 5. | Improvement of the ventilation system at weigang iron mine
韦岗铁矿通风系统改造 |
| 6. | Evolvement of ventilation system of houzhuang mine area
侯庄矿区通风系统的演变 |
| 7. | Installation of air conditioning and ventilating systems
空气调节和通风系统的安装 |
| 8. | Ways for the energy - saving of mine ventilation systems
矿井通风系统节能的途径 |
| 9. | Mine plans ; operational safety ; ventilation system
矿区平面图.作业安全性.通风系统 |
| 10. | Good practice on ventilation system noise control
控制通风系统噪音的优良手法 |
