... 操纵杆装置 arrangement of levers 吊杆装置 derrick arrangement; derrick rig; derrick system 吊化杆装置 cargo derrick ...
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derrick system
吊杆系统
以上为机器翻译结果，长、整句建议使用 人工翻译 。
This article introduces the construction technology, facilities layout, derrick system security, quality and safety requirements.
结合工程实践对施工工艺、设施布置、井架制安、质量安全要求进行了介绍。
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One of two Shell ships that drilled last year in the Arctic Ocean, it has a 160-foot derrick rising from its center and no propulsion system of its own.
NPR: Grounded Shell Oil-Drilling Ship Refloated
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