: . : . : . : 137.

: . 180 . ( ) .

: [ ] :0- . 2- . 3- . 4- . 5- .

: .(:)

: : .

:

Reference:

- http://earth-arch.blogspot.com/2010/04/70.html

- http://www.hi-mama.com/forum/%D8%A7%D9%84%D8%A3%D9%82%D8%B5%D8%B1%D9%88%D8%A3%D8%B3%D9%88%D8%A7%D9%86-%D8%A3%D9%85%D8%A7%D9%85%D8%B9%D9%8A%D9%86%D9%8A%D9%83/12773.html

- http://www.aregy.com/forums/showthread.php?t=30573