Others from V or X shapes. Some canopies are a single piece and some are two pieces with a hydraulic ram at the hinge-joint.

另从V或X形。一些檐篷是一个单一的作品，有些是两件与液压内存在铰链联合。

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On the basis of analysing the structural characteristics of the motion-decoupling hydraulic servo shoulder joint, virtual design method is used to design and analyse the joint.

在分析解耦型液压伺服肩关节结构特点的基础上，运用虚拟设计方法对关节进行设计和分析。

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In the light of the disadvantages and limitation of the existing unscrewing type or shearing type safety joints, a hydraulic sleeve type safety joint is designed.

针对现有倒扣式和剪断式安全接头结构上的局限性和缺陷，设计了液压滑套式安全接头。

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The joint Green Party and Alliance motion was opened by Anna Lo who said the four licences for exploration for hydraulic fracturing, known as "fracking", had been granted despite a "severe deficiency of research".

BBC: Hydraulic fracturing