11. The investigation involves a machine that uses hydraulic pressure to test material strength. 12. The hydraulic pressure reducer limits the amount of rudder deflection that can occur. 13. He retired on lap 48 when the car's hydraulic pressure dropped . ]] 14. This was simply a variable width sheave controlled by spring and hydraulic pressures . 15. Finally losing its hydraulic pressure , the aircraft became impossible to control. 16. The cause of the hydraulic pressure problem was not immediately known . ( may) 17. This was a single piece of steel that was radially expanded under hydraulic pressure . 18. Hydraulic telescopic cylinders are often limited to a maximum hydraulic pressure of 2000-3000 psi. 19. With no hydraulic pressure , hydrodynamic forces on the propellers caused the pitch to reverse. 20. This system will not engage during normal driving conditions, when hydraulic pressure is equal.
