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

        2012年6月，“尖兵之翼——第四屆中國無人機(jī)大會暨展覽會”在北京展覽館、中苑賓館隆重開幕。來自國內(nèi)外70余家單位展示了67架無人機(jī)整機(jī)及相關(guān)產(chǎn)品。來自航空、航天、兵器、船舶、電子、高校、科研院所、空軍、海軍、武 警、氣象、測繪、環(huán)保、電力、鐵路、海洋、民政、貿(mào)易行業(yè)的代表參觀展覽，涵蓋無人機(jī)的產(chǎn)、學(xué)、研、商、用單位。

In June 2012, “Vanguard Wing — the fourth session of China UAV Conference and Exhibition”was grandly opened at Beijing Exhibition Hall and Central Garden Hotel.More than 70 units from home and abroad exhibited 67 UAV overall machines and related products.Representatives from aviation, aerospace, armament,ship,electronics,universities,scientific research institutes, air force, navy, armed police,weather, surveying and mapping, environmental protection, electric power, railway,marine,civil administration and trade industries,covering visited the exhibition, covering the units who produce, study, research,trade and use UAV.