主气，即主时之气，主治一年四季的正常气候变化。
应用湿式主气氧化处理废碱液已有多年历史。
The treatment of spent alkali liquor with wet air oxidation (WAO) has been developed for some years.
肺主气司呼吸。
其屏蔽盒应用主气隙，防止原电流产生的磁场集中在屏蔽壳的金属板内。
Its shielded box should be used the main air gap and prevent the primary current to produce the magnetic field concentrating in the shield shell metal plate.
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