当你在伟大祖国的首都——北京,高兴地乘坐地铁列车游览各具特色的地铁车站时,定会被车站内墙面和立柱上的装饰所吸引。特别是立柱上那大理石花纹装饰板,如果你事先不知道它是塑料的话,一定误认为是天然大理石板。因为这些塑料装饰板与天然大理石板真是真假难辨。塑料制品作为新型建材的历史还不长,但 When you are in the capital of the great motherland, Beijing, you are happily taking subway trains to explore the distinctive metro stations, which will surely be attracted by the decoration on the interior walls and pillars of the station. In particular, if you do not know that it is plastic beforehand, it must be mistaken for a natural marble slab. Because these plastic decorative panels and natural marble panels are really difficult to distinguish. The history of plastic products as new building materials is not long, but