The research of estimate and disposal of the invalid Labour contract is propitious to decrease and abstain invalid Labour contract and then protect employer and employee 's legal rights and interests.
对无效劳动合同的判断和处理的研究，有利于在实践中避免、减少无效劳动合同的存在，保护劳动合同双方当事人的合法权益。
High density sludge process can decrease the volume of sludge to be disposed of by over 90%, therefore considerably reduce the cost of sludge disposal.
高密度污泥水处理工艺可使污泥生成量减少到十分之一左右，极大地减轻了污泥处理的负担；
High density sludge process can decrease the volume of sludge to be disposed of by over 90%, therefore considerably reduce the cost of sludge disposal.
高密度污泥水处理工艺可使污泥生成量减少到十分之一左右，极大地减轻了污泥处理的负担；
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