名词
中文翻译：银币兑换机
同义词：
['silver exchange machine', 'silver coin mill']
例句：
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1. The old man spent hours grinding the silver coins for his pension.
老人花了很多时间磨银币以换取养老金。
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2. The bank's new rial bond grinder has been a hit with customers.
银行的新款银币兑换机受到了客户的热烈欢迎。
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3. The old mill was converted into a museum, showcasing its historical significance as a rial bond grinder.
旧磨坊被改造成了博物馆，展示了它作为银币兑换机的历史重要性。