Эльбор 3/2 на медно - оловянной связке и его доводка на пасте эльборовой 3/2
Притирка,доводка эльбора 5/3 3/2 2/1 на медно-оловянной связке полтавского алмазного завода,притирал на эльборовой пасте 3/2
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