DEVICE FOR MEASURING SMALL SLOPE ANGLEES von UVAROV ANATOLIJ A,SU, POGODIN VIKTOR I,SU, VASYUTIN BORIS V,SU, ZAJTSEV SERGEJ A,SU, BEREZIN ALEKSANDR A,SU, BOLOTOVSKIJ DAVID M,SU, VORONIN ANATOLIJ N,SU, GROSS YAKOV G,SU

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