الغاز والبترول، حفر واستخراج

TT-TEKNIKK AS

PETROLEUM GEO-SERVICES ASA

PETROLIA DRILLING ASA

NOIL ENERGY ASA

AWILCO OFFSHORE ASA

TOTAL NORGE AS

DNO INTERNATIONAL ASA

IDEMITSU PETROLEUM NORGE AS

INTEROIL EXPLORATION & PRODUCTION ASA

SHELL CENTER AS

SONGA OFFSHORE SE

NORSE ENERGY CORP. ASA

PETROJACK ASA

DUNLOP HIFLEX AS

HERTZBERG VARMETEKNIKK AS

LARSEN KNUT ING AUT RØRLEGGERMEST AS

COMFORT FREDRIKSTAD ARNE NILSEN AS

SENTRUM RØR AS

LØRENSKOG VVS AS

STEINAR LEVERNES AS

MARTINSEN & BRODAHL AS

AUT RØRLEGGERMESTER ØIVIND RUUD AS

RØRLEGGERSENTRALEN AS

RØRMONTASJE AS

TOTAL VVS AS

BYE & DØHLEN VENTILASJON AS

SAPA PROFILER AS

CHEVRON NORGE AS

NORSK HYDRO OIL & GAS RUSSIA AS

WIEN OG LIE RØRLEGGERBEDRIFT AS