| 1. | So the exhaust valve opens before bdc and closes after tdc
因此排气门在下止点之前打开，在上止点之后关闭。 |
| 2. | Budc before upper dead center
上止点前 |
| 3. | Btdc before top dead center
在上止点前 |
| 4. | Atdc after top dead center
在上止点后 |
| 5. | Atdc after top dead cetner
上止点后 |
| 6. | Atc after top center
在上止点后 |
| 7. | Tdcs tdc sensor
上止点传感器 |
| 8. | Therefore the valve is opened before tdc ( btdc ) and closed after bdc ( abdc )
因此阀门在上止点( btdc )之前被打开，在下止点( abdc )之后关闭。 |
| 9. | The system collects top dot sign , speed , pressure and ion currency
系统本身具备采集到发动机的上止点、转速、压力和离子电流信号等功能。 |
| 10. | The engine is motored in search of position of dynamic tdc for combustion analysis needs exact reference information
倒拖发动机确定动态上止点的位置，为燃烧分析提供准确的基准信息。 |
