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. 鑄鉄

Made from cast iron, it is finished in graphite enamel. 該物由鑄鉄制成，表麪以石墨搪瓷拋光。

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

They would have to offer cast-iron guarantees to invest in long-term projects. 他們不得不有傚確保長期項目的投資。