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parallel advanced heading method
释义
parallel advanced heading method
Encyclopedia
工学
平行超前导坑法
释
parallel advanced heading method
平行超前导洞法
在隧道正洞一侧开挖一条平行或近平行的超前导洞,根据导洞所揭示的地质情况,通过地质理论和作图法推测正洞掘进面前方一定范围内地质条件的地质预报方法。
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