Natural water retting has the weak points of long retting time, hard sledding, unstable quality and water pollution.
天然水沤麻存在费工、费时、劳动强度大、质量不稳定、污染环境等缺点。
Technical renovation of acetone refining system was carried out because of unstable quality and output of acetone production.
针对丙酮产品的质量及产量不稳定的状况，对丙酮精制系统进行技术改造。
The paper discusses the problems regarding the low efficiency and unstable quality of the power supply in the electric network at universities.
分析了高校现有供电网络存在的效率低、能耗大和供电质量不稳定的问题。
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