Iron line replacement method is used to recovery metal silver from silver sulfate in COD waste liquid, and it is reused to analyze, so analysis cost and environment pollution are decreased.
对COD废液中的硫酸银，采用铁线置换法回收金属银，进行循环使用，降低了分析费用，减小了环境污染。
In the evaluation process, replacement cost method was used concurrently with the market method.
评估主要采用重置成本法，同时结合市场法进行。
The preparing method of the invention can be used for preparing the biological replacement (recovery) body for hard tissues such as human bones, teeth, etc.
本发明可用于制备人体骨骼和牙齿等硬组织用生 物置换（修复）体。
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