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Wide provided suitable for busy trunk, also can be laid in tunnel and station floor maintenance difficulties, stone or soil subgrade are laid, but the mud pumping in the diseases of roadbed must be laid on the roadbed diseases after renovation. The main advantages of the wide sleeper circuit are: the suborbital sinking is small. The vibration acceleration is smaller than the concrete sleeper line, which gradually slows down and stops after laying. So the line maintenance work is greatly reduced, about a third of the general concrete sleeper line. The track is easy to keep clean. Dirt is not easy to break into the bed and prolong the repair cycle of the route. The line is smooth and stable, which is conducive to high-speed operation and the laying of seamless circuit. The disadvantage is that the cost is higher, and it is more difficult to change the shop on the busy trunk line
Qualir Auto Electronics Co., LTD, founded in 1998, aims to Make car owners' drive with less effort and cosily by providing auto electronics of Quality and Reliability. In May 1998, Qualir developed and produce Car CD, VCD Players and home CD,DVD Players. In March 2003, Qualir began to develop and provide Car Mp3 players,Car DVD Players,and properly developed Car DVD Players with Built-in GPS function in 2004. In June 2007, Qualir decided to develop a platform for direct wholesale of Auto electronics. In September 2007, Qualir's wholesale Dept was successfully founded and our online wholesale store was finally completed.
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