Tubes within each device pump air bubbles through to support the autotrophs.This also circulates the sewage to feed the bacteria.
设备内的水管使气泡穿过设备，为自养生物提供养分，同时使污水循环，为细菌提供养分。
Tubes within each device pump air bubbles through to support the autotrophs. This also circulates the sewage to feed the bacteria.
设备内的水管使气泡穿过设备，为自养生物提供养分，同时使污水循环，为细菌提供养分。
A constriction in a powder pump that USES compressed air to lift and transport powder from feed system to the spray gun.
在粉末泵中的收缩能够使压缩空气从喂料系统到喷粉枪提升和搬运粉末。
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