Use High Grade Material 使用优质材料
Its main products include cotton yarn, grey cloths and high-grade material for clothing.
企业主导产品：棉纱、坯布和高档成衣面料。
Because some of that material was covered as long ago as eighth grade, Frazer must take time to review so his students can pass the high school test.
因为有些内容是在八年级教授的，Frazer必须花时间为学生复习好让他们通过考试。
Damper: both gas flow regulating button and wind board are high grade PP material, connected with 304 stainless steel bar, manually adjust the outside valve knob, control air flow.
气流调节阀：气流调节扭与挡风板均为高密度PP材质，用304不锈钢方棒连接，手动调节外部阀门旋钮，控制气流量。
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