annual change of magnetic variation
[测绘学英汉词典]
annual change of magnetic variation年差
磁偏角的周年变化值。
是什么意思,annual change of magnetic variation的解释,annual change of magnetic variation的翻译
[海运英汉词典] annual change of magnetic variation
annual change of magnetic variation
[测绘学英汉词典]
annual change of magnetic variation是什么意思,annual change of magnetic variation的解释,annual change of magnetic variation的翻译
[海运英汉词典] annual change of magnetic variation