365 × 10 ( ) 200 2 6 3 80 × 10 36 × 10 ( Uk13K + Uk23K - Uk12K ) 100 2 Sb Un3T1 XIIIT1 := 200 2 SnT1 Un3T1 ( ) 2 6 3 XIIIT1 = 0.059