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BMW's history began in 1916 and translated into bayer in China's early years. The company was originally an aircraft engine manufacturer, and in 1917 it was a limited liability company, and in 1918 it changed its name to the Bavarian engine manufacturing company and went public. Jingqiu names "- otto high achievements in the field of aviation, made him with great ambitions to build cars, he later this decision, for the automotive history writing down a glorious page, that is by millions of fans love the German BMW depot today.
When the dog chewed the leash the lead went in the case and unraveled the coil spring. With the case facing you possess it steady and grab the loose end of the lead and pull on the cause add tension. Now that you just have about two feet of lead out, support the mechanism while preventing the lead wheel assembly from unwinding rewind the extra lead that you just got out, without releasing the tension.
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
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