名词
中文翻译：改变接触点
同义词：
['switching contact', 'transition contact例句：1. The new system requires a change-over contact to be established.（新系统需要建立一个新的转换接触点。）']
例句：
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1. The new system requires a change-over contact to be established.
新系统需要建立一个新的转换接触点。
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2. During the power outage, we had to switch over to a backup contact.
在停电期间，我们不得不切换到备用接触点。
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3.The engineers are working on changing over the old contacts to the new ones.
工程师们正在努力将旧的接触点更换为新的接触点。