al salamo 3alikom
el a7' 3abood el 7elw
ezay hatesta7'dem motor fe saroo7' -rocket- fe no3een men el rockets
1
solid fuel rockets
2
liquid fuel rockets
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dab3an el LIQUID FUEL ROCKET dah la yomken 3amaloh
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walaken el SOLID FUEL ROCKET yomken 3amaloh besohola
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we el LINK dah momken yesa3dak fe deraset el no3een
http://science.howstuffworks.com/rocket.htm