In order to get a good economic effect and make use of the good geographical position, the cave extension becomes a favorable option for the rock cave construction.
为了取得良好的经济效益和利用原有洞库良好的地理位置，洞库扩挖成为岩石洞库施工中一项非常值得考虑的方案。
In order to get a good economic effect and make use of the good geographical position, the cave extension becomes a favorable option for the rock cave construction.
为了取得良好的经济效益和利用原有洞库良好的地理位置，洞库扩挖成为岩石洞库施工中一项非常值得考虑的方案。
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