With natural colourant the process can be served as clean process owing to its natural degradation and non-toxicity side effect.
天然色素可自然降解、无毒性副作用，可以作为清洁染色工艺。
With natural colourant the process can be served as clean process owing to its natural degradation and non-toxicity side effect.
天然色素可自然降解、无毒性副作用，可以作为清洁染色工艺。
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