Quality objectives must be set, and quality of water must be maintained.

所以,必须建立水质标准, 并坚持水质要求.

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More refined interpretations of the sanitary quality of water were based upon this knowledge.

根据这个道理对水质卫生可作更加精确的解释.

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The protection of drinking water source to safeguard the quantity and quality of water.

饮用水源保护和水量、水质保证.

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Well drilling technology is the key for securing quality of water supply wells.

成井工艺是保证供水井质量的关键工艺.

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To improve the quality of water also prevented the loss of production, increased product output rate.

在改善品质的同时也阻止了产生水分损失, 增加了产品的产出率.

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Methods Vicia - micronucleus test, the hygienic quality of water samples , including physical , chemical and epidemiology investigations were used.

应用蚕豆根尖微核技术, 水质理化检验及流行病学调查.

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