T1R12=T2R22\rm{ \dfrac{T_{1}}{R_{1}^{2}}=\dfrac{T_{2}}{R_{2}^{2}} }R12T1=R22T2
T12R13=T22R23\rm{ \dfrac{T_{1}^{2}}{R_{1}^{3}}=\dfrac{T_{2}{ }^{2}}{R_{2}{ }^{3}} }R13T12=R23T22
T13R12=T23R22\rm{ \dfrac{T_{1}^{3}}{R_{1}^{2}}=\dfrac{T_{2}{ }^{3}}{R_{2}^{2}} }R12T13=R22T23
T112R1=T22R2\rm{ \dfrac{T_{1}{ }_{1}^{2}}{R_{1}}=\dfrac{T_{2}{ }^{2}}{R_{2}} }R1T112=R2T22