Making use of waste concrete to replace traditional material, its result is good, good economic benefit has been get in utilization of waste concrete.
利用废混凝土，可代替传统骨料，效果良好，在对废混凝土利用得到较好的经济效益。
Making use of furnace gas can not only convert the waste into a useful material, it is also a comprehensive measure to clean up the air and decrease the pollution.
如何利用电石炉的炉气使它变废为宝，这不仅是节约能源也是净化空气、减少污染的一项综合性的措施。
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