A railway monitoring system firstly includes an optical fiber. A first part of the fiber is attachable to one of a pair of tracks of a rail, and a characteristic of the first part of the fiber is variable in correspondence to variance of a characteristic of said one track where the first part of fib.....
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一种用于三轴试验的自动和连续地测定土样受压时体积改变的装置，包括一个具有柔韧橡胶膜壁的容器１３，土样１０装在所述容器内。在样品上加上一个载荷排出样品中空气和水分。在样品受压过程中，通过将水泵进或泵出内腔１９０来测量受压样品的体积改变量。
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The invention relates to an FRP (fiber reinforce plastic) tube-concrete-steel tube combined tube tower comprising an inner steel tube, an FRP outer tube and a concrete layer, wherein the inner steel tube is formed by connecting a plurality of steel tube segments, the FRP outer tube is formed by conn.....
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