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
问题及改造措施。
；水管；虹吸作用（
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问题及改造措施。
The former used microcatheter to "embed" the tumor vessel, the later used "siphonal" technique.
比较两
疗效、副作用并作应用价值
析。
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