old sand bar 古沙堤
Old Sand Lake 街道地址
old sand recycling 旧砂再生
Old sand reclamation 回收使用
process of old sand recycling 旧砂再生工艺
Old Red Sand 老红砂
old cement stable sand 旧水泥稳定砂砾
The best characteristic can be used in the complexed sand containing 50% old sand.
该粘合剂最大特点是能回用旧砂,回用的比例可达50%。
Since then, the old man furtively fetched the gold sand once every half a month or so, so he became rich soon.
从此,老汉过个十天半月就偷偷来取一次金砂,日子很快富裕起来。
However, the foundry plant of tsinghua university lacks old sand with high temperature and can not carry out test of cooling control.
但因清华大学铸造厂缺乏温度较高的旧砂,以致无法进行降温控制效果的试验。
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