ROLLER BIT OF DRILLING TOOL
VOJTENKO PAVEL I,SU, BUGAJ YURIJ N,SU, DERGUNOV VLADIMIR I,SU, MILEVSKIJ EDUARD B,SU, MUSTAKHIMOV RAIS S,SU, LYSYJ MIKHAIL I,SU
Year of Publication 23.02.1985
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Year of Publication 23.02.1985
Patent