The airport ramp or apron is part of an airport. It is usually the area where aircraft are parked, unloaded or loaded, refueled or boarded. Although the use of the apron is covered by regulations, such as lighting on vehicles, it is typically more accessible to users than the runway or taxiway. However, the apron is not usually open to the general public and a license may be required to gain access.
http://en.wikipedia.org/wiki/Airport_ramp

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Note added at 24 mins (2011-07-06 03:49:05 GMT)
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I'm having some doubts about this, Could it be hangars?

A hangar is a closed structure to hold aircraft and/or spacecraft in protective storage. Most hangars are built of metal, but other materials such as wood and concrete
http://en.wikipedia.org/wiki/Hangar

Could it be hangars
مواقف طائرات
apron
ساحة المطار
على اعتبار أن ساحة المطار ليست فقط مكانًا للوقوف، بل وللتفريغ والتحميل والتزود بالوقود والركوب أيضًا حسب الرابط الأول

لا أعرف ، لننتظر رأي الزملاء

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Note added at 24 mins (2011-07-06 03:49:40 GMT)
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ملحوظة: هانجار تترجم حظيرة طائرات وفق بعض القواميس