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。
In present gravity exploration of overthrust nappe, people usually use gravity continuation method, forward gravity modelling method and integrated gravity-seismic interpretation method.
目前，应用重力资料研究逆冲推覆构造，多采用重力延拓法、重力模型正演法和重力、地震综合解释法。
In present gravity exploration of overthrust nappe, people usually use gravity continuation method, forward gravity modelling method and integrated gravity-seismic interpretation method.
目前，应用重力资料研究逆冲推覆构造，多采用重力延拓法、重力模型正演法和重力、地震综合解释法。
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