Then, the mathematical model of common hydraulic element is built.
根据液压元件的键合图模型，建立对应的数学模型。
Pollution of hydraulic medium was a main cause that made hydraulic element wear earlier.
液压介质的污染是液压元件过早磨损的主要原因。
Pollution of hydraulic medium was a main cause that made hydraulic element wear earlier.
液压介质的污染是液压元件过早磨损的主要原因。
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