used sand

基本解释

This paper is concerned with the basic principle and features of a new-type used sand reclaiming outfit with spiral vibration.
阐述了新型螺旋振动旧砂再生成套装置的基本原理和特点，介绍了成套装置的组成、生产使用情况和良好的效果。
They learned to use the shadows cast by the sun. They marked the hours on candles, used sand in hour-glasses, and invented water-clocks.
可判断出人们曾经通过数自己的心跳、使用蜡烛、沙子和水和观察太阳的阴影来计算时间，但没有讲使奴隶整日整夜地忙碌，所以选项。
According to the current study of used sand reclamation and its development, new viewpoints of selecting the methods and equipments of used sand reclamation are expounded.
根据旧砂再生研究和发展的现状，阐述了选择旧砂再生工艺方法及设备的新观点。

But, lacking good construction materials, they used sand.
ECONOMIST: The Aral Sea
About 10, 000 gallons goes down a well--less than 1% of the 1 million gallons of water and 1 million pounds of sand used.
FORBES: Energy
Across the bay, fancy yachts and speed boats crowd the shores of the Ilha, a once almost deserted strip of sand used mainly by poor fishermen, on which smart restaurants and nightclubs for the new elite are now springing up.
ECONOMIST: The oil money may start to trickle down