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通过工业试验并对其结构进行改进后,保加利亚有色金属公司(普罗夫迪夫)和铅锌冶炼厂(克尔日利),在硫酸锌系统采用一种室式圆盘压滤机。
After passing industrial tests and improving its structure, the Bulgarian Nonferrous Metals Company (Plovdiv) and the lead-zinc smelter (Kerrli) used a chamber-type disc filter press in the zinc sulphate system.