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Well, Wind turbines are cheaper per Watt produced but it requires more maintenance, and more knowledge and technology required, Wind turbines production depends on wind s ... See More
wind turbines is better and why ? its rpm can be controlled by equation d1/d2 =n1/n2
ااالصفة المثلى للحصول على العمل هي الدقة والمصداقية في المعلومات المقدمة عن طريق السيرة الذاتية ... See More