此方法以初冷器前吸力值的大小，通过变送器反馈给电磁阀和液力耦合器，实现煤气风机的吸、压力自动调节，不但比改造前传统的“大、小循环”方便、稳定，而且节能、环保、低噪音。
In this way, the cycle is not only more convenient and stable than traditional big-small cycle, but also the energy saving, environment protection and low noisy can be realized.
用于高速重型轨道机车，该液力传动箱为三循环园，具有宽广的高效率工作范围和强劲的牵引特性。
Being used in high-speed heavy railcar. This type of the Hydraulic Transmission Box has three circularities and higher efficiency in work scope. It is level separateness, and double outputs.
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