On-site operation test shows that the research oil has an evident edge over the original hydraulictransmissionoil.
在现场运行试验中，研制油的性能比参比油有显著提高。
2
Due to the need of hydraulictransmissionoil source, the structure is relatively large and complex, and there is a certain pollution to the environment.
由于液压传动需要油源，结构相对庞大和复杂，且对环境有一定污染。
3
Water hydraulic drive system has some advantages of oilhydraulictransmission such as large power, high efficiency and compact structure as well as the unique advantage of environment-protection.