冻雨

我看着象是3500 Carling Ave.

Close enough! It is a hidden place, not too far from my office. I went to work right after taking the photo.
 
什么是PVC?
维基百科的解释
Polyvinyl chloride, more correctly but unusually poly(vinyl chloride), commonly abbreviated PVC, is the third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene.[4]

PVC comes in two basic forms: rigid (sometimes abbreviated as RPVC) and flexible. The rigid form of PVC is used in construction for pipe and in profile applications such as doors and windows. It is also used for bottles, other non-food packaging, and cards (such as bank or membership cards). It can be made softer and more flexible by the addition of plasticizers, the most widely used being phthalates. In this form, it is also used in plumbing, electrical cable insulation, imitation leather, signage, inflatable products, and many applications where it replaces rubber.[5]

Pure poly(vinyl chloride) is a white, brittle solid. It is insoluble in alcohol but slightly soluble in tetrahydrofuran.

百度解释
聚氯乙烯
(英文為PolyVinyl Chloride,縮寫PVC)是一种使用一个原子取代聚乙烯中的一个原子高分子材料

就是塑料制品的原料吧。 
 
歪楼了,把意思给商业化了。抱歉!:shy:
 
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