GB/T 15456-2019工业循环冷却水中化学需氧量(COD)的测定高锰酸盐指数法国家标准
英文:Determination of the chemical oxygen demand in industrial circulating cooling water—Permanganate index method GB/T 15...
英文:Determination of the chemical oxygen demand in industrial circulating cooling water—Permanganate index method GB/T 15...