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Is a new type of ballastless track, with reinforced concrete slabs, and under the big board with emulsified asphalt cement mortar as the first adjustment layers (or overlay on a cushion of high molecular elastic material layer) consisting of orbit. This kind of track is suitable for stone roadbed or non - ballasted deck. The asphalt concrete bearing layer shall be installed on the soil foundation. This kind of track integrity is good, the line is stable, the maintenance workload is small, but the cost is high, the construction period is long. Japanese railways have been used in the Shinkansen
In the '80s and' 90s, the district hospital had no beeper and had to let family members run errands. "Nurse, there's no potion in the six, seven or eight beds in our room. Please go and change them quickly." A patient's family came to the nurse's office to yell.
In the field of archaeology, most of the evidence are metal, such as musket bullet, cartridge, bullets, artillery and shells, shrapnel and/or of the sword, what are the specific evidence depends on the battle took period of history. Thus, the most important tool for field archaeologists is simple metal detectors
When using the computer to issue the dispatch order, it is necessary to strictly abide by the release procedures of "one, two, one, three, four, confirmed and signed". You must carefully check the contents of the order and sign in time.
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