名词
中文翻译：硬铸铁
同义词：
['hardened iron', 'hardened steel例句：1. The construction workers used hard cast iron to build the bridge.（建筑工人使用硬铸铁建造了这座桥。）']
例句：
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1. The construction workers used hard cast iron to build the bridge.
建筑工人使用硬铸铁建造了这座桥。
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2. Hard cast iron is often used for making heavy machinery parts.
硬铸铁常用于制造重型机械部件。
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3.The car's engine was made of hard cast iron, which made it durable and powerful.
汽车的发动机是用硬铸铁制成的，这使得它耐用且有力。