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 경각계는 건물의 기울기를 측정하는 데 사용됩니다.I gyeonggakgyeun geonmul-ui giulgeul cheugjeonghaneun de sayongdoemnida.This inclinometer is used to measure the tilt of the building.