The selection of openchamber blasting parameters in our mine has been introduced for communion and improving the technology of openchamber blasting.
通过对本矿露天矿山硐室爆破参数选择介绍,达到相互交流,进一步提高露天硐室爆破技术的目的。
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You can then open the chest, and take from it as many pence as you please, they are only copper pence; but if you would rather have silver money, you must go into the second chamber.