其中节流调速回路的功率损失大，低速稳定性好。
Speed control loop in which the power loss of throttle large, low-speed stability.
而容积调速回路既无溢流损失，也无节流损失，效率高，但低速稳定性差。
The volume loss of speed control loop neither overflow nor throttling losses, high efficiency, but poor low-speed stability.
传统的转向系统无法满足低速时灵活性和高速时稳定性的要求。
Traditional steering system can not meet the flexibility at low speed and stability at high speed.
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