ROTARY-IMPACT DRILLING MACHINE
YAKUNIN MIKHAIL K,SU, LYSENKO RUDOLF P,SU, SHILOV VIKTOR A,SU, DENISOV NIKOLAJ E,SU, BURLAKOV ALEKSANDR L,SU, SHUMOV VLADIMIR G,SU
Year of Publication 23.11.1992
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Year of Publication 23.11.1992
Patent