名词
中文翻译：开关
同义词：
['switch', 'switchgear', 'switchgear assembly', 'switchgear unit', 'switchgear assembly unit']
例句：
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1. Theswitch-fuse is used to control the flow of electricity.
开关-熔断器用于控制电流的流动。
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2.The engineer had to replace the switch-fuse because it was faulty.
工程师不得不更换开关-熔断器，因为它有故障。
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3. The switch-fuse is a safety device that prevents electrical fires.
开关-熔断器是一种安全设备，可以防止电气火灾。