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用能再生的无机盐除锈剂代替酸洗除锈，实现不排放＂三废＂的闭路循环，并采用连续再生方法，保证稳定的除锈速度，能满足大规模连续焊管生产的需要。
Regeneration of inorganic salt rust remover instead of pickling rust, to achieve non-discharge “three wastes” closed-loop, and the use of continuous regeneration method to ensure a stable rate of rust, to meet the needs of large-scale continuous pipe production.