perfect model of ship magnetism 完备船磁模型
heading survey of ship magnetism 船磁方位测量
ship permanent magnetism 永久船磁性 ; 永久船磁
ship ' s magnetism 船体磁性
ship s magnetism 船体磁性
ship subpermanent magnetism 半永久船磁性
athwart ship permanent magnetism 横向永久船磁
sub-permanent magnetism of ship 船舶亚固定磁性
应用推荐