在印度大陆东部200英里（326公里）处，Tata咨询服务中心的总技师Ananth Krishnan也在为一个低技术的设备而激动不已：清水过滤器。

In Chennai, 200 miles (326km) farther east, Ananth Krishnan, chief technology officer of Tata Consultancy Services (TCS), is equally excited about an even lower-tech device: a water filter.

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主过滤器进行连续清理，次过滤器收集细小颗粒，同时采用热泵来提升总热效率。

The primary filter for continuous cleaning, and the secondary filter for collection of fine particles. Heat pump can also be offered to increase the total thermal efficiency.

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