1. exhaustor are fixedused independently or parallelly.(2)Corrosion resisting,The outer cover is of stainless steel.
   (2)耐腐蚀、外壳采用全不锈钢和防腐壳两种，噪音低，寿命长。
2. exhaustor are fixed and used independently or parallelly.（2）Corrosion resisting,The outer cover is of stainless steel.
   （2）耐腐蚀、外壳采用全不锈钢和防腐壳两种，噪音低，寿命长。

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