idiom > When the axis of the
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When the axis of the
  Explanation: Is in the middle of the axle. Analogy Guanju to bits.
  Usage: Joint type; as predicate; analogy to bits Guanju
  Source: Huan Kuan Han "miscellaneous on Salt and Iron": "cars prime minister that the list of Lu week, when the axis of, the Kuonang does not talk, shelter away, he is indeed! He is indeed!"
Is in the axle center position
  Is in the axle center position. Metaphor Guanju positions. Han Huan Kuan, "Salt and Iron Hybrid Theory": "cars prime minister that the list of Lu week, when the axle, the Kuonang not speak, shelter away, he zai! He Zai!"
Translated by Google
No. 3
  当轴处中 ( dāng zhóu chǔ zhōng )
  解 释 轴:车轴。中:中心。正处在车轴的中间。比喻官居要位。
  出 处 《汉书·公孙刘田王杨蔡陈郑传赞》:“车丞相履伊、吕之列,当思处中,括囊不言,容身而去,彼哉!彼哉!”
  示例:公~,率下以义。 ★《宋书·武帝纪中》
  用 法 联合式;作谓语;比喻官居要位