国偷自产一区二区免费视频,美女免费视频一区,九九热线视频只有这里最精品,欧美日韩一区成人

       2011年9月，由中國(guó)科學(xué)技術(shù)協(xié)會(huì)、中國(guó)宋慶齡基金會(huì)、共青團(tuán)中央共同指導(dǎo)，中國(guó)航空工業(yè)集團(tuán)公司、中國(guó)航空學(xué)會(huì)聯(lián)合主辦，北京高博特廣告有限公司協(xié)辦，中航文化股份有限公司和中國(guó)航空博物館承辦的“2011北京國(guó)際無人機(jī)及航模展”在北京中國(guó)航空博物館舉辦。

In September 2011, the “2011 Beijing International UAV and Model Airplane Exhibition” was co-hosted by China Aviation Industry Group and China Aviation Society,co-organized by Beijing GBT Advertising Co., Ltd and co-undertook by China Aviation Culture Company Limited and China Aviation Museum, at China Aviation Museum (Beijing) at the joint guide of China Association for Science and Technology, China Soong Ching Ling Foundation and the Central Committee of the Communist Young League.