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Keywords: (NrUDNI^NYJ (B((N[AHTNYJ(B) (NTRANSPORT(B. (NdOSTAWKA PO LAWE(B, (NOTKATKA PO [TREKAM(B, (NPOD_EM PO STWOLAM(B. (NtRANSPORT NA POWERHNOSTIs