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。

Lofty derricks dot the landscape in an oil field.

高耸的井架点缀着油田的景色。

Derricks are scattered here and there on the boundless plain.

在一望无际的原野上散布着一座座井架。

Capacity of derricks 20tonnes.

船吊吊载能力20吨。

Let's keep away from the derricks.

咱们离吊杆远一点走。

Keep safe working load of derricks.

让吊杆在安全负荷下工作。

All derricks lowered down and secured.

放下，绑牢吊杆并报告。

All derricks lowered down and secured.

所有出口已关紧。

There is a man a certain colonel derricks…

有个人，一个陆军上校德里克…

Lower down and secure all derricks and report.

放下，绑牢吊杆并报告。

Please swing the derricks outboard. We want to use the shore crane.

请把吊杆甩到外档去，我们要用岸吊作业。

AI, Annual Inspection for Derricks and Permanent Attachments to the Derricks, Masts and Decks;

吊货杆及连接于吊货杆、桅和甲板的固定零部件的年度全面检验；

Please swing the derricks at Hatch No. 3 to the shoreside because our floating crane will come alongside to unload the heavy lifts.

请把三舱吊杆移到里档，因为我们的浮吊要到外档卸重件。

Derrick guy wire as the special supporting member of downhole derricks, its performance has much impact on the mechanical behavior of derricks.

绷绳作为作业井架的特殊支承构件，其工作特性对作业井架的力学行为有较大影响。

A calm brown waterway flows beneath the bridge, interlaced with palm-treed fingers of land; a chaos of water towers, cranes and derricks is revealed in the distance.

一条褐色运河静静地从桥下淌过，交错划过旁边的一片种满棕榈树的狭长地带。自来水塔四处错落耸立，远处隐约可见起重机和铁架塔。

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。

Operating engineers: Playing with giant toys like bulldozers, front-end loaders, backhoes, scrapers, motor graders, shovels, derricks, large pumps, and air compressors can be fun.

施工工程师：摆弄那些大型玩具可能是很有趣的，比如推土机、前载车、反向铲、刮运机、平地机、铲车、起重机、大型水泵以及空气压缩机。

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。