books مفرغ هواء
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# vacuum cleaner
# vacuum valves
# vacuum tube
# Vacuum cleaning
# Vacuum hearing the call to prayer
# vacuum engineering
# vacuum distillation
# vacuum pump
# vacuum buildings
# vacuum permeability
# Vacuum washing
# vacuum flask
# Vacuum and a warm cup
# Vacuum gowns
# Vacuum stability and instability
# Vacuum obsessions
# Vacuum tube calculation
# vacuum installations
# deflated constellation
# Vacuum dryer
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تفريغ من الهواء (Info)
تفريغ من الهواء:- ويستخدم للتعبير عن تفريغ الهواء من جهاز مخبري حسب شروط التجربة (المعجم الموحد لمصطلحات الهندسة المدنية)
