The existing problem in operation of siphonal sand filter and innovation were introduced.
介绍了虹吸式砂滤器在运行过程中出现的问题及改造措
。
用的（等于siphonic）The existing problem in operation of siphonal sand filter and innovation were introduced.
介绍了虹吸式砂滤器在运行过程中出现的问题及改造措。
The former used microcatheter to "embed" the tumor vessel, the later used "siphonal" technique.
两
疗
、
用并应用价值分析。
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