VI. Structure of the lower section 1.7.2. -Abutment abutment of the old and new structures.-Cylindrical structure.-Nail structure-Note the investigation, survey the scope, extent of abutment erosion, piers.
VI.1.7.2 structure below. - Structural new abutments and the old abutments. - Structural office. - Structural foundations - Note investigation, surveying the scope and severity of erosion abutments, piers.
Vi.1.7.2 lower structure.- new and old structure of M M.Column structure.Foundation structure- pay attention to investigation, the scope of the investigation, the level of M chongta, pier.