1·All to ROHS standard, plating line with general international environmental protection standards, the lead, cadmium, mercury, hexavalent chromium not to exceed bid.
所有镀种符合ROHS标准，符合国际通用环保标准，铅、镉、汞、六价铬不超标。
2·All the ROHS standards, in conformity with the plating line with general international environmental standards, lead, cadmium, mercury, hexavalent chromium not to exceed bid.
所有镀种符合ROHS标准，符合国际通用环保标准，铅、镉、汞、六价铬不超标。
3·Hexavalent chromium plating has weaknesses such as toxicity and environmental pollution.
六价铬电镀具有毒性大、环境污染严重等缺点。
4·The research development of microbial reduction of hexavalent chromium in wastewater is described.
本文综述了微生物还原处理含六价铬的废水的研究进展。
5·The experimental results showed that boiling water extraction is suitable for testing soluble hexavalent chromium compounds and weak alkaline extraction suitable for amphoteric metal coatings.
实验表明，沸水萃取法适用于可溶性六价铬的萃取，弱碱萃取法可用于两性金属涂镀层。