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
구경측정은 기계의 정확성을 보장하는 데 중요합니다.gugyeongcheugjeongeun gigeui jeonghwakseong-eul bojanghaneun de jungyohamnida.Calibration is important to ensure the accuracy of the machine.