... cross-spread横排列 cross-stratum交错层 cross-tie横向拉杆 ...
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cross stratum 交错层
sand cross-stratum sets 砂层交错层层组
cross s stratum 交错层
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It is difficult for mined tunnel with shallow cover to cross water-rich sand stratum.
穿越富水砂层一直是浅埋暗挖隧道的难点。
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