HELIX

COMPRESSORS FOR CRYOGENIC REFRIGERATORS; CRYOPUMPS, PRIMARILY COMPRISING COMPRESSORS, REFRIGERATORS AND CRYOPANELS, AND PARTS THEREOF

ELECTRONIC MONITORS AND CONTROLS FOR CRYOPUMPS; MONITORS AND CONTROLS FOR CYROGENIC REFRIGERATOR SYSTEMS

CRYOGENIC REFRIGERATOR SYSTEMS, PRIMARILY COMPRISING COMPRESSORS AND GAS EXPANDERS, AND PARTS THEREOF