系统全封闭，可自动更换溶剂和排出废液，避免有毒试剂外逸。
Whole system is sealed, preventing escaping of poisonous gas. Automatic reagent change, automatic discharge waste water.
自动更换溶剂和排出废液，避免有毒试剂外逸，保证操作人员及环境安全。
Automatic replacement of solvents and waste discharge to avoid escape of toxic reagents, ensuring the operator and environmental safety.
它是造纸厂排出的废液中的主要成分，是主要的水污染源之一。
But lignin becomes one of the main pollution sources, coming from waste water in the paper-making factory.
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