【经】 cost of exploration and appraisal of the field
oil field
【化】 oil field
【经】 oil field
prospect; prove; exploration; reconnoitre
【经】 exploration
and; attend; get along with; give; help; offer; take part in; with
【计】 AND
assessment; evaluate; evaluation
【化】 assessment; evaluation
【经】 appraisal
charge; cost; expenditure; expense; fare; fee; outlay; rate
【经】 charge; charges; cost; expenditure; expense; outgoings; outlay