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
흡출관은 물체의 내부에서 외부로 물질을 이동시키는 데 사용됩니다.heupchul-gwaneun mulche-ui naebueseo oeburo muljileul idongsikineun de sayongdoemnida.The draft tube is used to move substances from the inside of an object to the outside.