apv6
- Avramov V.E., Khmel'kovskii I.E., Tsaregorodtsev M.E., Chikhachev O.M., Avramov P.V., Egorov N.V. Ore explosion technique. SU Patent No 1292406, Filed on October 22, 1986, Priority November 19, 1984, E21 C 37/00
- Khmel'kovskii I.E., Avramov V.E., Chikhachev O.M., Chernykh N.V., Avramov P.V., Urbaev A.O. Chikhachev M.M. Explosion of complex-structured ore blocks. SU Patent No 1292411, Filed October 22, 1986, Priority February 11, 1985, E21 C 41/06, 37/00
- Avramov V.E., Avramov P.V., Chikhachev O.M., Khmel'kovskii I.E., Tsaregorodtsev M.E. Ore dispersion technique. SU Patent No 1318289, Filed February 22, 1987, Priority December 24, 1985, B02 C19/00
- Avramov V.E., Kazmin M.I., Avramov P.V. Device for the combined bore holes drilling. SU Patent No 1546602, Filed on November 1, 1989, Priority December 8, 1987, E 21 B 7/14, E 21 c 37/16