- + U1 a K iS iN D0 id Ud Ed Rd iS iN Ud B¨m ¸p song song 0 TCK b t1 ÷ TCK - kho¸ K hë ÷ t1 - kho¸ K ®ãng t1 t t t B¨m ¸p song song iS iN Ud 0 TCK b t1 ÷ TCK - kho¸ K hë ÷ t1 - kho¸ K ®ãng t1 t t t - + U1 iN a K iS D0 id Ed Ld Rd Ud B¨m ¸p song song iS 0 iN Ud t1 t1÷TCK - kho¸ Khë b 0÷t1 - kho¸ K TCK t t t