derricks

Oil drilling derricks are important constitutes of oil industry equipments, it belong to large bearing structure.

石油钻机井架是石油工业生产设备中的重要组成部分, 属于一种大型承重结构,对油田生产起着重要作用.

The field tests show that it is reliable and effective to determinate the safe load carrying ability of truck-mounted derrick, K-shaped and tower-shaped derricks using this method.

结构模态迁移诊断方法客观地反映了井架整体结构状态，现场应用表明，该方法对车载井架、K形和塔形井架的安全承载能力标定可靠，效果良好。

Steel derricks rose to meet our eyes as we drew nearer to the oil fields.

我们快到油田时看到了矗立的井架.

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.

Engineers-Give orders to tell them to move and automatically capture oil derricks or other civilian buildings.

工程师 —— 可以让它们移动自动占领油井或其他中立建筑.

You have derricks at all hatches , don't you?

你们所有舱口都有吊杆是 吗 ?

Please adjust your derricks properly.

请把吊杆调整好.

Let's keep away from the derricks.

11咱们离吊杆远一点走.

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.

General cargo is loaded and unloaded by cranes or ship's own derricks.

纯货用伏重机或用船舶大家的吊杆装卸.

Keep safe working load of derricks.

让吊杆在安全负荷下工作。

Lofty derricks dot the landscape in an oil field.

高耸的井架点缀着油田的景色.

Effect of oblique tension link on front leg stability of open front derricks

斜拉杆对前开口井架前大腿稳定性的影响