derricks

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。

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

请把三舱吊杆到里档，因为我们的浮吊要到外档卸重件。