7km

In low Earth orbits , they are travelling at about 7km a second ( 25200km / h ) .

在近地轨道，这些碎片的飞行速度大约为每秒7公里（合每小时25200公里）。

Damage behaviors of several metal materials under impacts of projectiles with hypervelocities of 2.6 ~ 7km / s

几种金属材料在2.6～7km/s弹丸撞击下的损伤行为

Distance to airport : 26km distance to new harbour : 3km distance to Xiuying port : 7km distance to railway station : 10km .

距机场26公里，距新港码头3公里，秀英码头7公里，火车站10公里。

The weapon operator search and locate the target using a periscope optical sight ( 7km range ) in day light , or a thermal imager at night or in bad weather conditions .

武器操作员在白天亮光下使用一个潜望镜白光瞄准镜（7公里范围）或在不良天气条件或夜间使用热成像去搜寻和定位目标。

The crash site , north east of Dignes-les-Bains in Haute Provence , is 7km from the nearest road and at an altitude of 1600 metres .

坠机地点在上普罗旺斯阿尔卑斯省（Alpes-de-Haute-Provence）迪涅莱班（Digne-les-Bains）东北方向，距最近的道路为7公里，海拔1600米。

La Naci ó n , a newspaper , found that a 7km journey to or from the city centre at rush hour took nearly twice as long by bus or car as by bike .

当地报纸LaNación报道从市中心出发或者到市中心的七公里在高峰时段骑车比公交或者开车要快几乎两倍。

Wang Zujian , a director of the Provincial Railway Construction Bureau , told the official Xinhua news agency that investigations after the accident found evidence of subsidence along more than 7km of the line .

湖北省铁路建设办主任王祖建对官方通讯社新华社称，事故发生后进行的调查发现，有逾7公里的轨道路基存在沉降现象。

The experimental setup and technique of laser driven flyer were build and developed in this dissertation , the highest flyer velocity of about 7km / s was obtained and good integrity and plane of flyer were confirmed .

本文建立和发展了激光驱动飞片的实验系统和实验技术，获得了约7km／s的最高飞片速度，飞片具有较好的完整性和平面性。

The results show that this method is capable of measuring aerosol backscatter ratio profile of low-altitude troposphere ( below 7km ) at the same time as wind measurement , which can define the wind measurement sensitivity . Aerosol extinction coefficient and lidar ratio are additional parameters acquired in measurement .

结果表明，系统可在测风的同时获取低空对流层（6、7km）以内的气溶胶后向散射比廓线，以进行多普勒激光雷达灵敏度的标定，并可获取气溶胶的消光系数、激光雷达比等参量。