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
이 지도에서 등경사의 등사습곡의 선을 찾을 수 있습니다.I jidoeseo deunggyeongsaui deungsaseupsokui seon-eul chaj-eul su issseubnida.You can find the isolinal line on this map.