Several imported membrane materials which use mostly in China now are also introduced.
介绍目前国内应用最多的几种进口膜材的性能。
They mostly manufacture in China to supply the domestic market.
为了供应中国国内市场，他们主要在中国境内生产。
In China, because of its tradition, the old people are mostly supported by their children.
在中国，因为传统的原因，老人总是由子女赡养。
In China, because of its tradition, the old people are mostly supported by their children.
在中国，因为传统的原因，老人总是由子女赡养。
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