... are the manufacture of the spun silk yarn in China. 2)The main raw silk 20/22D,4A or 5A. ... in China.2)The main raw silk 20/22D,4A or 5A.3)silk yarn nature fibre,useful for the ... products are all kinds of "commercial chariot" brand white steam filature, silk and flax yarn, 18,000 tons annual output ... of white steam filature, silk 38 thousand tons, 120,000 tons of flax ...