operative operation of a business for others, namely, of internal combustion engines, compressors and piston compressors, for others, namely, in refineries, in petrochemical or chemical installations, in oil and gas transport installations, in oil and gas conveying installations, in oil and gas storage installations, gas and water separation and injection installations, in installations for generating liquefied natural gas, in gas separation installations and in synthesis gas installations, in installations for fuelling up gas-driven vehicles, and in power plant installations; commissioning of internal combustion engines, compressors and piston compressors

repair, namely, servicing, maintenance, repair of internal combustion engines, compressors and piston compressors; operative operation of internal combustion engines, compressors and piston compressors, for others, namely, in refineries, in petrochemical or chemical installations, in oil and gas transport installations, in oil and gas conveying installations, in oil and gas storage installations, gas and water separation and injection installations, in installations for generating liquefied natural gas, in gas separation installations and in synthesis gas installations, in installations for fuelling up gas-driven vehicles, and in power plant installations in the nature of mechanic services

custom construction of internal combustion engines, compressors and piston compressors

technical system analysis in the nature of computer systems analysis, examination, assessment and evaluation of internal combustion engines, compressors and piston compressors in the nature of product quality evaluation; preparing and conducting of status inspections on internal combustion engines, compressors and piston compressors, and fields of use therefor in the nature of monitoring internal combustion engines, compressors and piston compressors for quality control purposes; identification and documentation of weak spots and possibilities for improvement in internal combustion engines, compressors and piston compressors in the nature of monitoring internal combustion engines, compressors and piston compressors for quality control purposes

preparing and conducting of status inspections on internal combustion engines, compressors and piston compressors, and fields of use therefor in the nature of security inspection services for others; identification and documentation of weak spots and possibilities for improvement in internal combustion engines, compressors and piston compressors in the nature of security inspection services for others