安装平衡机的地基不符要求，底部结合面未垫实，地脚螺栓未紧固，或放在楼面上，引起共振。

5 installation of balancing machine foundation does not meet the requirements, combined with the bottom surface without pad, the anchor bolt is not fastened, or on the floor, causing resonance.

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古实人以伯米勒对耶利米说，你用这些碎布和破烂的衣服放在绳子上，垫你的胳肢窝。耶利米就照样行了。

And Ebedmelech the Ethiopian said unto Jeremiah, Put now these old cast clouts and rotten rags under thine armholes under the cords. And Jeremiah did so.

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