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The concrete (usually with steel bar) is poured directly into the stable and solid roadbed, and the new line of ordinary sleeper and gravel bed is not used. This kind of line is clean, suitable for large volume and difficult maintenance area, especially for tunnel, underground railway, port wharf and stone road base. But its construction investment is big, if because of the construction slapdash or basement instability, concrete layer fracture, cure difficulty. China's overall Taoist route in the tunnel is more than 300 kilometers long
Continuous traffic:
Industry analyst InfoTrends predicts an improvement inside retail value of the North American digital wide-format print within the five-year period 2011 - 2016 that has reached over 46 per cent, from US $16.1 bn (€12.4 bn) to $23.6 bn (€18.1 bn). A late 2012 survey completed by the UK's Image Reports magazine indicated that nearly two-thirds of respondents were expecting wide-format work to turn into a bigger part inside their businesses on the next couple of years, and merely over half were looking to recruit additional staff on this period.
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