Artificial meridian is a test apparatus for magnetic effects in airworthiness standards of civil planes.
人工子午线是民用飞机适航性标准中磁影响试验的设备。
The civil aviation minister ordered all the planes to be grounded.
该民航部长命令所有飞机不得起飞。
Iran's civil fleet is made up of planes in poor condition due to their old age and lack of maintenance.
伊朗的民用航空大都是由一些质量较次,年久失修的飞机组成。
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