The test results show that the better blasting effect and obvious technical and economic benefits in coal rock drivage can be acquired by means of the quasi-parallel cutting method.
实践表明，在煤矿岩巷掘进中使用准直眼掏槽方式，能够取得良好的爆破效果和显著的技术经济效益。
The test results show that the better blasting effect and obvious technical and economic benefits in coal rock drivage can be acquired by means of the quasi-parallel cutting method.
实践表明，在煤矿岩巷掘进中使用准直眼掏槽方式，能够取得良好的爆破效果和显著的技术经济效益。
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