Technical specification for maintenance of sea-crossing highway bridges Technical specifications for field inspection of existing highway bridges Technical specifications for maintenance of highway cable-supported bridge 并列题名：Technical specifications for maintenance of highway cable-supported bridge Technical specifications for maintenance of highway asphalt pavement Technical specification for post-grouting of cast-in-place pile of highway bridges Technical specification for variable stiffness bearings of highway beam bridge Technical specifications for construction of highway tunnel Technical specifications for strengthening of highway tunnel Technical specifications for application of pebble concrete to highway bridges and culverts