- Ifthetrappedpressurebleedsofftheunloaderwillcycle,orhunt.Lookforanysignsofleakingbetweenthegunandtheunloadervalve.Thispaperbringsanovelfour-drumelectricaldifferentialcontrolsystemofbridge-typegrabshipunloader.Thesimulationofthevalveplatehasbeenworked...
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