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A substantial reduction in the seamless rail joint, reducing the impact of rail wheels through joint, which saves line maintenance costs, prolong the service life of rail, abate the locomotive vehicle noise, etc., therefore, developed rapidly. In the 1930s, German and American railroads began to carry out small test lines, and by 1981, the world had laid a seamless line of about 300,000 kilometers, of which China lay about 8,000 kilometers
Step up transformers increases the voltage level from primary to secondary but with the corresponding decrease in the current and vice versa.
A hard reset basically resets certain parameters of one's iPod returning to default. You will not lose your music and other files. However, some of the settings may reset. The time and date for the iPod will probably be preserved, unless your iPod may be completely drained of all battery then reconnected to power. In that case, you may lose time and date settings. Your other settings, such as bookmarks, playlists, timers, etc. will probably be preserved in the last time you used your iPod.
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