iron sand [矿物] 铁砂
sand iron ore 砂铁矿
sand cast pig iron 砂铸生铁
marine iron ore sand dredger 海上铁矿砂开采船
sand-cast pig iron [机] 翻砂铸铁
iron-sand 铸铁砂
Sea sand iron ore is a kind of cheaper ore, using this ore as sintering material can decrease production cost.
海砂是一种价格比较低廉的含铁矿物，作为烧结原料有利于降低烧结矿的生产成本。
Only two types of irons were used during the feathery ball era, the sand iron with a large concave face and the rut iron which had a very small head.
在羽毛高尔夫球时代，仅有两种高尔夫球杆被使用，一种是带有大凹杆面的沙铁杆，另一种是杆头很小的。
When these rocks break down into the grains that make up the sand on our beaches, their colour is mostly determined by the presence or absence of iron.
当岩石分解成为颗粒够成沙滩时，颜色则是由铁元素氧化物的存在与否决定的。
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