37 CONSTRUCTION AND MAINTENANCE OF PIPELINE SYSTEMS, ONSHORE CONTRACT ROTARY DRILLING AND OTHER OI L AND GAS RELATED FACILITIES FOR OTHERS
39 TRANSPORTING CRUDE AND REFINED PETROLEUM AND NATURAL GAS BY WAY OF PIPELINE FOR OTHERS
42 EXPLORATION FOR AND DEVELOPMENT OF OIL AND GAS AND OTHER HYDROCARBONS, DRILLING AND OPERATING OIL AND GAS WELLS AND OTHER OIL AND GAS RELATED FACILITIES AND PROVIDING ENGINEERING SERVICES AND PROJECT MANAGEMENT FOR OTHERS