This product to my gastroesophageal reflux disease really plays a large role, since I've been using it put my mattress upper up never happen counter-current.
这个产品对我的胃食管逆流症真的起了很大的作用，自从我用了它把我的床垫上部抬起来再也没有发生逆流过。
2
A case study of gas separation system is given to illustrate the effects of product quality, reflux ratio and tower pressure to total economic benefit through flow simulation.