名词
中文翻译：铁制开关
同义词：
['iron switch', 'metal switch例句：1. The old iron switch was rusty and difficult to turn.（旧的铁制开关生锈了，很难转动。）2. The engineer replaced the old iron switch with a new one.（工程师用一个新的铁制开关替换了旧的。）']
例句：
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1. The old iron switch was rusty and difficult to turn.
旧的铁制开关生锈了，很难转动。
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2. The engineer replaced the old iron switch with a new one.
工程师用一个新的铁制开关替换了旧的。
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3.The farmer used an iron switch to control the gate.
农民使用一个铁制开关来控制大门。