Permanent towers, called derricks, used to be built to handle the long sections of drilling pipe.

被称为井架的永久性的塔，过去是为处理长距离钻探管道而建的。

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If long sections in the report are not green, project managers and development leads should determine the root of persistent problems.

如果报表中有较长部分不是绿色，则项目经理和开发主管应确定持久性问题的根本原因。

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If long sections in the report are not green, project managers and development leads should determine the root of persistent problems.

如果报表中有较长部分不是绿色，则项目经理和开发主管应确定持久性问题的根本原因。

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