ไนโตรเจนเหลว: ยมทูตแห่งอุณหภูมิต่ำ
???????????? ??? ?????????? ?????? ???? ????? {??????????? ??????????????? ? ???????????? {????????????? ?? {????????????? ??? ?????????. ??????? ????? ?????????? ????????????? ???????????????????????????????????
????????????: ?????????????????????
???????????? ????/???/?? ????????????????/????