Task: Translation
Input (Czech): «ehlic  stroj obsahuje oto n²  ehlic  v lec (14), pevnou trubici (34), um st nou souose uvnit° oto n ho  ehlic ho v lce  (14), vyh° vac  prost°edky (42), ulo en  uvnit° mezilehl ho prstencovit ho prostoru (40) mezi oto n²m  ehlic m v lcem (14) a pevnou trubic  (34), a prost°edky (46, 48, 50, 52, 62, 68) pro cirkulaci vzduchu pro zaji  ov n  cirkulace vzduchu v uzav°en m okruhu uvnit° oto n ho  ehlic ho v lce (14). Prost°edky pro cirkulaci vzduchu obsahuj  ventila n  prost°edky (62, 68), uspo° dan  pro nas v n  vzduchu ze dvou koncov²ch oblast  mezilehl ho prstencovit ho prostoru (40) a pro jeho vh n n  zp t do st°edov  oblasti mezilehl ho prstencovit ho prostoru (40).\
Output (English): The machine has a rotary heater in the sleeve (14), a rigid sleeve (34), coaxially positioned inside the sleeve in the sleeve (14), the heating means (42), inside the sleeve. an intermediate annular space (40) between the turntable (14) and the fixed tube (34), and means (46, 48, 50, 52, 62, 68) for air circulation to provide air circulation closing the circuit inside the heater in the housing (14). The means for air circulation comprises a valve means (62, 68), an arrangement for air inlet from the two end regions of the intermediate annular space (40) and for its return to the middle of the intermediate region. annular space (40).