cast iron

1. N-UNCOUNT Cast iron is iron which contains a small amount of carbon. It is hard and cannot be bent so it has to be made into objects by casting. 铸铁

Made from cast iron, it is finished in graphite enamel. 该物由铸铁制成，表面以石墨搪瓷抛光。

2. ADJ A cast-iron guarantee or alibi is one that is absolutely certain to be effective and will not fail you. 确保有效的

They would have to offer cast-iron guarantees to invest in long-term projects. 他们不得不有效确保长期项目的投资。