The ملک Diaries
حمل بارهای فلهای بیشتر از ۳۲ کیلومتر میتواند مقرون به صرفه باشد.When the available motor energy greater throughout the 1920s and 30s, wings could be built significant and powerful more than enough that bracing wasn't needed anymore. This type of unbraced wing is known as a cantilever wing. W