As the power piston moves to the right, the yellow linkage forces the loose-fitting, red piston(on the left half of the machine) to displace air to the cooler side of the engine.

当施力活塞到达右边时，黄色连杆会轻轻地带动红色“活塞”（在机器左边），使空气移到引擎较冷的一边。

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In the OpenStack space companies like Mirantis, Piston Cloud, CloudScaling, Nebula and even IBM, Canonical and Red Hat are begining to benefit from this new consultant centric view of IT rather then the more traditional one size fits all approach of data center software popularized by VMware.

FORBES: Paypal To Drop VMware From 80,000 Servers and Replace It With OpenStack (Updated)