It's shorthand for above sea level. A term generally used to define how the top on Earth is to a certain position.
00:46, 15 January 2013
A sharp end object has an edge that can cut or and end that ...
The Boeing 777-Freighter is an all-cargo version of the ...
Turkish Airlines is the national flag carrier airline of ...
One of the elements that constitutes an airplane, the ...
A plane that is powered by sunlight. A solar plane uses ...
Lighting system: all the lightning in an area and the items ...
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