When used in the hand will lift, although the umbrella in the first invented in the main purpose, are used to blocking sunlight, but most often now regarded as rain gear block rain.

使用时是以手将之举起，虽然伞在最初发明时的主要目的，是用来阻挡阳光，但是现在最常被当作雨天挡雨的雨具。

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Based on the theory analysis, the reason was discovered of oil- blocking during the operation of a gear oil pump, which resulted in power loss, vibration and noise.

通过分析 ，找出了齿轮油泵在运转过程中造成困油容积而形成功率损失、振动和噪声的原因 ，为设计和维修齿轮油泵提供了消除困油现象的方法和结构措施。

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But the police - in full riot gear - do not agree and are ringing the metal barriers that are blocking off the park.

BBC: Protesters circle NY's Zuccotti Park