Immersion-based cryogenic submersible pumps, designed to realize “zero leakage” of low-temperature medium, have a wide application in the transmission of inflammable, explosive and toxic ultralow-temperature mediums. The Company owns proprietary intellectual property rights to its cryogenic submersible pumps. Through years of technological achievements, the Company now masters core technologies in the design of low-temperature and high-speed shielded electric motor, the cryogenic sealing of binding posts, and axial force balance design. Meanwhile it has independently researched and developed devices of pump pond, bottom valve, pump well and lifting as well as explosion-proof binding post with a hermetically sealed dinitrogen system.