T1R12=T2R2\frac{\mathrm{T}_{1}}{\mathrm{R}_{1}^{2}}=\frac{\mathrm{T}_{2}}{\mathrm{R}_{2}}R12T1=R2T2
T12R13=T22R23\frac{T_{1}^{2}}{R_{1}{ }^{3}}=\frac{T_{2}^{2}}{R_{2}{ }^{3}}R13T12=R23T22
T13R12=T23R12\frac{\mathrm{T}_{1}^{3}}{\mathrm{R}_{1}{ }^{2}}=\frac{\mathrm{T}_{2}^{3}}{\mathrm{R}_{1}^{2}}R12T13=R12T23
T12R1=T22R2\frac{\mathrm{T}_{1}^{2}}{\mathrm{R}_{1}}=\frac{\mathrm{T}_{2}^{2}}{\mathrm{R}_{2}}R1T12=R2T22