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
폭압계는 기계의 압력을 측정하는 데 사용됩니다.pokapgye-neun gige-ui aplyeog-eul cheugjeonghaneun de sayongdoemnida.The pressure gauge is used to measure the pressure of the machine.