·City gas pipeline risk assessment system was awarded a certificate of scientific and technological a 2009.04.01
·City gas pipeline risk assessment of the applicability of the method 2008.12.17
·Gas Pipeline Inspection System project of the General Assembly to convene a smooth 2008.12.10
·Gas pipeline risk assessment system of scientific and technological progress awards appraisal 2008.11.16
·Fuel gas pipeline risk assessment system expert appraisal meeting 2008.10.16
·Fuel gas pipeline risk assessment system promotion meeting 2007.10.01
·Fuel gas pipeline risk assessment system expert advisory 2005.05.15
·City gas pipeline risk assessment of the applicability of the method 2008.12.17
·Gas Pipeline Inspection System project of the General Assembly to convene a smooth 2008.12.10
·Gas pipeline risk assessment system of scientific and technological progress awards appraisal 2008.11.16
·Fuel gas pipeline risk assessment system expert appraisal meeting 2008.10.16
·Fuel gas pipeline risk assessment system promotion meeting 2007.10.01
·Fuel gas pipeline risk assessment system expert advisory 2005.05.15
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