n.镀铁(钢化作用)
I have an inquiry here for1000 ton of special alloy steel which I hope you can supply. 我这里有个询价，求购1000吨特殊合金钢，希望你方能供货。
An instrument used in surveying, consisting of100 linked pieces of iron or steel and measuring66 feet(20.1 meters). 测链测量用的一种工具，包含有100个相连的钢铁环，长66英尺(20。1米)
