UNI 6706-1970 Chemical analysis of the mineral manganese. Determination of barium oxide. UNI 6634-70. UNI 6642-70. UNI 6704-70. UNI 6705-70 and UNI 6707-70 replace UNI 3532
1970UNI 6706-1970 Chemical analysis of the mineral manganese. Determination of barium oxide. UNI 6634-70. UNI 6642-70. UNI 6704-70. UNI 6705-70 and UNI 6707-70 replace UNI 3532