HKSCOCA¹³⁹⁷⁹⁶ 基本例句 abbr.汉语水平考试Hanyu Shuiping Kaoshi The core business of HKS is the recycling of ferrous and non- ferrous scrap to create high grade raw materials for metal producers all over the world. HKS的核心业务是有色金属和非有色金属废料的回收，世界各地的金属生产商创造高档原料。 shhrui