掌握城区雨水径流水质及其主要的影响因素是有效地利用城区雨水资源和控制城市非点源污染的基础。
It is a critical basis for utilization of rainfall resource and pollution control of runoff in urban area to understand runoff quality and its main influential factors.
叙述稀土镀铬液中水质的控制、杂质的去除，以及其它故障的排除方法。
Quality control of water, removal of impurities and other troubleshooting cases in rare earth chromium plating are described.
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