Several "Why" in the Use of Recycled Rub

"Why do you want to use recycled rubber?" Faced with this problem, many rubber manufacturers will say,Of course, to reduce production costs ah!" It is well known that Xiaobian does not know whether it will attract this sentence to raise this question again --Is this not nonsense, do you have to make this question?" But Xiaobian really wants to tell you a fewwhy" in the use of recycled rubber.