| 1. | For this reason new valves were developed . 为此,研制了新的电子管。 |
| 2. | The safety valve of his anger opened . 他控制怒火的安全阀打开了。 |
| 3. | Streams are switched by solenoid valves . 流路靠电磁阀进行切换。 |
| 4. | The valve shown has a pilot and a bleed orifice . 该阀具有控制孔和流出孔。 |
| 5. | The vacuum valve opens to admit air . 真空阀开启以补充空气。 |
| 6. | All that is required is a valve . 全部所需的就只是一个活门。 |
| 7. | The connecting rod may drive a valve stem directly . 连杆可以直接带动阀门的把柄。 |
| 8. | A pump uses valves and pistons . 泵使用阀和活塞。 |
| 9. | Cars began using caps that incorporated two valves . 汽车开始使用装有两个阀门的油箱盖。 |
| 10. | The valve lifter, a round cylinder, rides on the cam . 气门挺杆为一圆筒体,坐落在凸轮上。 |