Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
측지용 위성은 지구의 형태를 측정하는 데 사용됩니다.cheugji-yong wiseng-eun ji-gu-ui hyeongtae-reul cheugjeonghaneun de sayongdoemnida.Geodetic satellites are used to measure the shape of the Earth.