As compared with the practically-measured results, the analysis and the calculation theory established in this paper about cutting noise of the small-sized disksaw machine is correct.
理论计算值与实测结果的比较表明，所建立的圆盘锯机锯切噪声分析及计算理论是正确的。
2
Based on analogous Theory, the large sized disksaw machine model is manufactured. The sound and vibration properties of model saw blades are studied systematically and deeply via experiments.
根据相似理论设计制造了大型圆盘锯机模型，通过实验对模型锯片的声振特性进行了系统深入的研究。
3
When the planet Mars was first observed through a telescope, people saw that the round disk of the planet was criss-crossed on earth that are viewed from an airplane.