Construction of the POSTTENSION system pipe (DUCT pipe CORRUGATE) in this industry are likely to decline because of the 2557 (2014) in recent years, the problem of political circumstances, the Government does not have a continuous investment in the utility business, so as a result, the construction industry grows more slowly. Buildings, shopping malls, housing, industrial Create a motorway bridge over the River Street Bridge separating the footbridge. Create a silo and other, but must use one of the devices, which are the DUCT pipe CORRUGATE used in construction to reduce costs. Time and materials (plaster iron wire).
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