However, the accident of drill string damage happened easily in the overthrust nappe belt of these regions in the drilling.
但是，在其逆掩推覆带钻井作业中，极易发生钻具失效事故。
However, the accident of drill string damage happened easily in the overthrust nappe belt of these regions in the drilling.
但是，在其逆掩推覆带钻井作业中，极易发生钻具失效事故。
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