The signal path of the VMA is changed through the position of the switch and the tube as well as the capsule, get biased in a different way.
该VMA的信号途径是通过开关的位置和管以及囊变，得到偏向于以不同的方式。
Reed SWITCH: Rhodium coated reed contacts in hermetically sealed, nitrogen filled glass capsule.
干簧：铑在密封的，氮气填充玻璃胶囊包覆芦苇接触。
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