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  2. List of abbreviations in oil and gas exploration and production

    en.wikipedia.org/wiki/List_of_abbreviations_in...

    HTM – helideck team member; HVDC – high voltage direct current; HWDP – heavy-weight drill pipe (sometimes spelled hevi-wate [citation needed]) HUD – hold-up depth; HUN – hold-up nipple; HUET – helicopter underwater escape training; HVAC – heating, ventilation and air-conditioning; HWDP – heavy weight drill pipe; HYPJ – hyperjet