不合标准

• There are many factors which contribute to the uneven surface of precast paving slabs . this may be due to the heavy loading caused by illegal parking of vehicles on the footway ; improper construction methods and substandard reinstatement works after road excavation
  （二）导致预制铺路砖表面凹凸不平的因素很多，包括在行人路上违例泊车，以致路面负荷过重；铺砌方法不当；以及掘路后进行的修复工程不合标准等。