We thank you for your letter of July 18 enclosing a sample cutting of woolen material.
谢谢你方七月十八日内附毛料剪样的来信。
These are the regulations concerning contamination by mildew in woolen or linen clothing, woven or knitted material, or any leather article, for pronouncing them clean or unclean.
无论是在羊毛衣服上，麻布衣服上，经上，纬上和皮子做的什么物件上，可以定为洁净或是不洁净。
The key technologies of application of PTT fiber in woolen fabrics such as material selection, weaving, dyeing and finishing were introduced.
就应用PTT纤维开发毛纺面料过程中的几个技术难点，如原料选择、染色、纺纱、织造、染整等工艺的调整进行了简单的介绍。
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