Photo 2 shows the valves with the valve spring retainers ready to go.

图片2显示阀与气门弹簧家臣准备。

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This device is composed of GO-FID, a six-way valve and a vacuum pump, which is controlled by a microprocessor in GC.

本方法采用由计算机控制的GC、大气样品浓缩管、电磁六通阀、真空泵及微处理机组成的全自动连续分析装置、完成定性定量分析。

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The new findings "go far beyond the fact that 24 ill patients received valve-in-valve replacement. They focus on the next step in the therapy of valvular heart disease," he writes.

这些新发现超越了24例患者接受“瓣中瓣”移植的事件本身，他们致力于心脏瓣膜疾病治疗的新进展，他写道。

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Or perhaps, since the clever stuff can go wrong, ballot-stuffing is a safety valve.

ECONOMIST: Election fraud