Gatling gun : hand - cranked multi barrel rotary gun . it was invented by richard j . gatling ( 1818 - 1903 ) during the american civil war 格林机枪:一种手摇多管旋转机枪，在美国南北战争期间由理查?格林发明。
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Gatling estimated that debris from the destroyed chinese weather satellite was travelling at some 17 , 000 miles an hour ( 27 , 000 kilometers an hour ) and would stay in space for three to five years 格林估计，被摧毁的中国气象卫星碎片每小时的速度大约是17000英里（每小时27000公里） ，并且会留在太空3到5年的时间。
