The volume loss of speed control loop neither overflow nor throttling losses, high efficiency, but poor 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.
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。
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