Type 37TF includes an internal resistor wired in parallel with the contacts which serves as an aid to factory circuit testing where the contacts are open at room temperature.

• 型号37TF包括有一个内部电阻，这个电阻与（一对）触点并联连接，这对触点对出厂前的电路检测能提供帮助，在室温下，这对触点是断开的。