the invention patent certificate of a seawater desalination device

utility model patent certificate of a heater for combined deep waste heat recovery heat supply network

patent registration for heat exchange equipment pressure experimental device

the invention patent certificate of the main oil pump cooler

the invention patent certificate of the main oil pump cooler

letters patent of appearance design for main pump oil cooler (of Hualong No. 1 Nuclear Power Plant)

utility model patent certificate of main pump lubricating oil cooler

utility model patent certificate of integral expansion heat network humidifier

utility model patent certificate of special capillary channel heat exchanger

utilit model patent certificate of a special mould for bending round pipe

utility model certificate of a rectangular snap sealing gasket for plate heat exchanger

utility model certificate of the utility model relates to a new heat exchange tube and a tube plate connection structure