Oil reducing valve belongs to the pilot valve piston valve.

进口油用减压阀属于先导活塞式减压阀。

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The utility model introduces a mechanism for guiding a valve piston returning to central positions, belonging to the technical field of a servomotor with follow-up action.

本实用新型介绍一种引导阀活塞复中机构，属于具有随动作用的伺服马达技术领域。

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Applied scope: automobile, motorcycle parts, air-conditioning compressor parts, valve, piston, piston rings, universal joints, gears, gear boxes, and so on.

此款超声波清洗机应用范围：汽车、摩托车零件，空调压缩机零件，气门，活塞，活塞环，万向节，齿轮，变速箱等。

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All it means is that the Piston is not the Steam Box that Valve plans to release.

FORBES: Xi3 Is Committed to Piston, While Valve's Steam Box Remains Elusive

Codenamed "Piston", the prototype, developed by Xi3 Corporation and funded by Valve, was unveiled at the CES trade show in Las Vegas.

BBC: Steam 'game console' hardware debuted at CES