实验室研究表明，水泥砂浆涂衬析出的金属量促使供水人员对管道涂衬所用的水泥应有所选择。
In a lab study, metals leached out from cement-mortar linings at levels that impel water suppliers to be selective when choosing cement for lining pipes.
实验室研究表明，水泥砂浆涂衬析出的金属量促使供水人员对管道涂衬所用的水泥应有所选择。
In a lab study, metals leached out from cement-mortar linings at levels that impel water suppliers to be selective when choosing cement for lining pipes.
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