annual change of magnetic variation
[海运英汉词典]
annual change of magnetic variation磁差年变化
是什么意思,annual change of magnetic variation的解释,annual change of magnetic variation的翻译
[测绘学英汉词典] annual change of magnetic variation
annual change of magnetic variation
[海运英汉词典]
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
[测绘学英汉词典] annual change of magnetic variation