A plug of cement or similar material placed as a slurry in a specific location within the wellbore and which has set to provide a means of pressure isolation or mechanical platform.

在井筒中以浆的形式置于某特定位置然后凝固的水泥或类似材料所成的塞子，它们在凝固后能隔离压力或提供机械平台。

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Another transit worker at the scene said it took 20 minutes before a contractor arrived to disengage the mechanical platform extender and another 10 before the victim was freed by police.

另一位现场列车工作人员告诉记者在承包商赶到解除站台系统后已经过去了20分钟，之后警察又花了10分钟将受害者救出。

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Mechanical design of stabilized platform unit is one of the key techniques in the rotary steering drilling tool.

稳定平台单元机械系统的设计是旋转导向钻井工具的关键和难点之一。

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With a one-head platform design and fewer mechanical parts, the reliability and acoustic features of the Spinpoint F4 have been improved.

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According to reports from the AP and a press release on the Geokinetics website, the men had initially evacated the platform on a liftboat, which can be lowered and raised from the rig by mechanical pulleys.

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