人类生活的世界就是一个振动的王国。城市的地下铁道在振动,人们上班路上要被公共汽车摇来晃去,工厂里机床——车、磨、刨、铣、钻等无不产生不同频率的振动。振动可以危害人们健康,被列为现代工业的一大污染。振动一旦超出了某种界限,许多严重疾病可接踵而来。例如长期使用风镐、砂轮、磨床等的工人,开始会感到头晕、疲劳、注意力下降,渐渐可导致 The world of human life is a vibrating kingdom. The city’s subway is vibrating, people are going to work on the bus to shake, the factory machine tools - cars, grinding, planing, milling, drilling, etc. all produce different frequencies of vibration. Vibration can endanger people’s health and is classified as a major pollution in modern industry. Once the vibration exceeds a certain threshold, many serious diseases can come one after another. For example, workers who use pneumatic picks, grinding wheels and grinding machines for a long time may initially feel dizzy, tired, distracted and may gradually lead to