All kinds of marine hydraulic units, like, stand-alone type main engine hydraulic top bracing, hydraulic flange bolt, hydraulic shaft coupling, gear coupling, and Alpha lubricator are all supplied in HJ. HJ is engaged in fabricating marine machinery and marine support equipment, our company started since 1973 to manufacture marine backflushing filters, self-cleaning filters, marine valve remote control system, marine engine hydraulic units and so on.