1. Level;
2. proportion;
3. constant speed;
4. slide valve;
5. Throttle;
6. to overcome;
7. occur;
8. power;
9. crank bearing, knee;
10. speed.
1. Level;
2. proportion;
3. constant speed;
4. slide valve;
5. Throttle;
6. to overcome;
7. occur;
8. power;
9. crank bearing, knee;
10. speed.