\(\alpha + L\) \(\xrightarrow{Cooling}\)} \(\beta\)
\(L\) \(\xrightarrow{Cooling}\) \(\beta\)
\(\alpha\) \(\xrightarrow{Cooling}\) \(\beta\)
\(L\) \(\xrightarrow{Cooling}\) \(\beta\) \(+ S \)
For a two-port network to be reciprocal, it is necessary that ……..