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FYFT SR-series unmanned blimps are Chinese UAVs developed by Qingdao Co., Ltd. Fei-Yu Aviation Science and Technology Co., Ltd. , and these unmanned blimps are named after their respective length. For example: if an SR4 series blimp is 11 meter long, then it is named SR4-1100, because 11 meter is equal to 1100 millimeter. SR-series UAV are intended to be research platforms, with SR standing for "Scientific Research".
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