CVI

[ metal cryogenic gas tanks; ] cryogenic metal pipes; manual metal cryogenic valves; [ and parts for all of the foregoing ]

cryogenic processing machines; cryogenic pumps and valves as parts of machines; and parts for all of the foregoing

cryogenic refrigerators; cryogenic gas liquefying units; cryogenic gas purifying units; cryogenic heat exchangers; and parts for all of the foregoing