In a hydraulic transmission system typical operating modes include manual operation、( )、( )、( ) and electro-hydraulic operation。

Power steering system sare divided into hydraulic power-assisted steering system, electro-hydraulic power-assisted steering system, electric power-assisted steering system and steer-by-wire system．

Please choose the main types of the power steering system used in cars today. A: Hydraulic Power Steering (HPS) B: Electric Power Steering (EPS) C: Electro-Hydraulic Power Steering (EHPS)

electro-hydraulic power-assisted steering system______

（Micro Electro Mechanical System）简称MEMS的中文全称。

Hydraulic fluid contamination may result in hydraulic failure and thus poses a threat to flight safety.

The automatic transmission consists of hydraulic torque converter, planetary gear sets and hydraulic control sets.

Hydraulic systems can provide hydraulic power for elevators so that to reduce the control force of the pilot for pitch control.

hydraulic power-assisted steering system______

The commonly used pressure control valve in hydraulic transmission system is ( ) A: directional valve B: relief valve C: hydraulic control check valve