The tension device can smoothly realize amplitudeofvariation of the crane jib and effectively relieve the deflection of the crane jib.
所述拉紧装置能够顺利地实现臂架的变幅，并能够有效减轻臂架的挠度；
2
The phase accords with other observation results basically, while the amplitudeofvariation is double. Our result of the amplitude is more close to the theory value (0.17%).
相位基本与其它观测结果相符，而变化幅度大1倍，我们的结果更接近于理论估计结果（0.17%）。
3
With the increase of soil depth, daily variationamplitudeof soil temperature decreases.