RU2051852C1 RU93002303A RU93002303A RU2051852C1 RU 2051852 C1 RU2051852 C1 RU 2051852C1 RU 93002303 A RU93002303 A RU 93002303A RU 93002303 A RU93002303 A RU 93002303A RU 2051852 C1 RU2051852 C1 RU 2051852C1 Authority RU Russia Prior art keywords vibrators belt tape group vibrating conveyor Prior art date …