The Nalco Company, with headquarters near Chicago, Illinois, USA, is the world leader for integrated water treatment and process improvement, focusing on water treatment and process chemicals.
纳尔科公司总部位于美国伊利诺斯州的芝加哥附近，是水处理和工艺过程处理化学品解决方案的领导者，主要服务领域为水处理和过程处理。
Black Belt is that person who master advanced process statistics analysis tools to improve complex business processes. In general, Black Belts are the leader of 6sigma improvement projects.
黑带是掌握高级流程统计分析工具并改进复杂工作流程的人员，他们通常领导六西格玛改进项目。
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