Each of the four legs contains a simple screw jack with a thrust bearing that is operated telescopically inside of two tubes.
四个支架中每个都装有一个简单的螺旋千斤顶，千斤顶中又装有一个可在两根管道中伸缩的推力轴承。
The position of the new planet was calculated from the movements of Uranus and subsequently identified telescopically.
他们根据天王星的运动，经过计算得出了新行星的位置。
The first to be discovered telescopically was Uranus.
第一颗以望远镜发现得行星是天王星。
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