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مهندس بترول - شرح تعريف Dogleg and Key seating لكى نتعرف على خاصيه key seating وهى مشكله تحدث اثناء الحفر لابد من معرفه مفهوم Doglegوهذا المفهوم ايضا من الاسباب الاساسيه فى مشاكل
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