float valve tower 浮阀塔
composite float valve tower 复合浮阀塔板
DJ-3 type tray and patent distributor were adopted to replace the original float valve trays without altering the tower shell.
采用DJ - 3型塔盘及DJ - 3型专利技术分布器替换了原浮阀塔板，实现了不动塔体的技术改造。
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