In this paper the demands, the lowest mass design principle of balancer shaft of fan type and eccentric circle type balancer mass are analyzed.

分析了扇形和偏心圆两种平衡轴设计的要求以及平衡重低质量的设计原则。

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This is partly because design museums clearly show how and why mass-products work and look as they do, and how design has improved our lives.

这在一定程度上是因为设计博物馆清楚地展示了批量产品的工作原理和外观，以及设计如何改善我们的生活。

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As reported in a Bloomberg story, MASS Design Group in Boston installed 24-foot Big Ass ceiling fans in the Butaro Hospital in Rwanda.

FORBES: How Big Ass Fans Can Improve Life for Working People, Fix the Economy, and Help Solve World Health Problems.

This allowed anyone to build their own windowfarm and then contribute to improving the design as part of a mass collaboration.

FORBES: Windowfarms R&D-I-Y: Lessons for Crowdsourcing Innovation & Incentivizing Engagement

Digital Forming, a related company (where Dr Mahdavi is chief technology officer), uses 3D design software to help consumers customise mass-produced products.

ECONOMIST: 3D printing