Components of automatic fire detection systems; part 7: point type smoke detectors; detectors using scattered light, transmitted light or ionization; german version EN 54-7:1984 (status as of 1988)— 18 стр.
Components of automatic fire detection systems; part 7: point type smoke detectors; detectors using scattered light, transmitted light or ionization; german version EN 54-7:1984 (status as of 1988)— 18 стр.