Technical specifications for buton asphalt rock in pavement engineering Technical specifications for highway asphalt pavement recycling Technical specification for buried plastic pipeline of sewer engineering Technical specification for assembled curtain wall engineering Technical specifiction for secondary water supply engineering Technical specifications for geological driling of highway engineering Technical specifications for geological mapping of highway engineering Technical specifications for utilization of construction waste in highway engineering Technical specifications for low temperature asphalt pavement construction Technical specification for warm mix asphalt pavement