Hydraulic retarder ichishandisa controller giya kudzora solenoid proportional valve kuvhura, gasi kubva mumotokari ichipinda mutangi remafuta kuburikidza neiyo solenoid vharafu, iyo oiri hydraulic ichipinda mugomba rekushanda pakati perotor, kufamba kweiyo rotor mafuta kukwira, uye chiito pa stato...
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