POLYESTER FILTER SLOTH FOR PURIFUING DUSTY GASES von KORUDANOV,GEORGI N, BELCZEV,DIMITR N, ABRASHEV,GEORGI I, ANDASOROV,ASEN K, KJUVLIEV,ALEKSANDR L, FILIPOV,DIMITR L, BONEV,BOJAN A, TENCZEV,DIMITR T

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