["全负压精馏",,"想请教一下全负压精馏的定义是什么？查了很多资料都没有确切的含义?????????????????????????","工艺要求，一些物料的理化性质要求，供参考。","查了很多资料都没有确切的含义，可能就没有确切的含义。本质上就是在负压下进行操作，负到什么程度要结合具体工艺解决实际问题为准，这次解释没那么重要","负压精馏，就是减压蒸馏，真没听过全负压精馏，”全“表示的程度还是过程？如果是程度那就是高真空减压精馏绝压在十位数左右（个位数的没见过）；如果是过程那就是各级蒸馏都是减压条件下","减压蒸馏就是负压状态蒸馏","好的\ud83d\ude0f"

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