Naturally these high rates of production were exhaustive of america's better ore supplies . 这样高的生产值自然会耗尽美国较佳的铁砂。
2.
The black aluminium oxide abrasive lower aluminium oxide abrasive is a new type abrasive material for polishing various metal works 黑刚玉砂又名"低铝刚玉砂铁砂粉"是一种新型抛光材料。
3.
Preparation of steel substrates before application of paints and related products - specifications for metallic blast - cleaning abrasives - chilled - iron grit 用涂层材料及有关产品涂覆前钢基体的准备工作.金属喷情理磨料的规范.冷淬铁砂粒
4.
According to the above - mentioned analyses , standard ceramic techniques were adopted to prepare spinel ferrite - based composite materials with iron - sand and the microwave - absorbing properties of spinel ferrite were improved through adding some appropriate mediums into those composite materials 在此基础上，采用传统陶瓷工艺，以铁砂为原料制备尖晶石型铁氧体基复合吸波材料并通过添加适当种类的介质制得尖晶石型铁氧体基混合吸波材料，提高了尖晶石型铁氧体吸波材料的性能。
5.
Tropical cyclone glenda , the second destructive storm to hit australia in 10 days , had earlier forced the evacuation of hundreds of people in larger towns , shut down oil and gas rigs and disrupted iron ore shipments in the region . meteorologists said the eye of the cyclone passed over the town of onslow , 1 , 390 km 860 miles north of the western australia state capital of perth , at 9 p . m . local time 以及铁砂矿开采作业已经停止预计这股热带气旋将在未来几小时之内到达位于澳洲西南海滨度假城市珀斯以北950英里约合1520公里的卡拉瑟市karratha以及澳洲西部拥有1 . 2万人的毕尔巴拉pilbara地区。
