derricks怎么读，derricks什么意思，derricks短语和例句

1.The problem of the effect of oblique tension link on the derricks' cross section frame in the front leg stability calculation of open front derricks remains unsolved.

在前开口井架前大腿的稳定计算理论中一直没有很好的解决井架横截面框架中斜拉杆的作用。

2.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。

3.They suffer from being heavier than conventional derricks and consequently are not usually found in offshore environments, where weight is more of a concern than in land operations.

桅架的重量较常规井架要大，因此海洋钻井中不常使用，因为海洋钻井时比陆地作业时更关注重量。

4.Keep safe working load of derricks.

让吊杆在安全负荷下工作。

5.They suffer from being heavier than conventional derricks and consequently are not usually found in offshore environments, where weight is more of a concern than in land operations.

桅架的重量较常规井架要大，因此海洋钻井中不常使用，因为海洋钻井时比陆地作业时更关注重量。

6.All derricks lowered down and secured.

所有出口已关紧。