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, : 3/2; 21/13 7/4. CuZn (1×1 + 1×2):2 = 3/2; Cu5Sn (5×1 + 1×4):6 = 3/2; Cu3Al (3×1 + 1×3):4 = 3/2.
3/2 b - . b - - CuZn (), CuSi (20 ) AgZn. 21/13 g - , a - Mn, 52 (Cu5Zn8). 7/4 e - (CuZn3).
, , . , . . , . . , . .
s - (Fe-Mo, Fe-W, Fe-Cr, Cr-Mn ..). s - , , 8%. 10% s - . s - , . s - 30 .
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