在2001年夏，我们决定将设备从后端技术提供商转换为前端面向消费者的搜索服务。

In the summer of 2001, we decided to switch the gear from a backend technology provider to a front-end consumer-oriented search service.

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这就意味着只有阀门轴的前端面可以作为检测面。

This means that only the front of the valve shaft is accessible.

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在飞轮前端面有一浅凹口，其用来确定第一个气缸中活塞的位置。

In the front face of the flywheel, there is a shallow indentation used to determine the position of the piston in the first cylinder.

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