拉链，装在衣物上，不失为一种开合自如的工具，可一旦将拉链这种功能放在马路上，则成了一种灾难。可惜的是，现实中竟常见有此现象，有些城市中的马路常被开膛剖肚，埋设更换各种管线，并且各部门各行其是，只见路面挖了填，填了又挖，二、三十公分的混凝土路面常被挖掉，又 Zipper, installed in the clothing, after all, a tool that can be opened and closed easily, but once the function of the zipper on the road, it has become a disaster. What is a pity is that this phenomenon is commonly found in real life. In some cities, the roads are often cut open and burial to replace various pipelines. Various departments are forced to do so. I saw that the roads were dug, filled and dug, Common concrete pavement often dug, again