Therefore, double screw compressor and worm compressor compared, in the same speed of the units inside less number of exhaust air ripple, big air flow noise.
因此，双螺杆压缩机与蜗杆压缩机相比，在相同转速下单位内排气次数少，气流脉动大，气流噪声大。
WT35-11 comes as an axial-flow roof fan that features low and medium levels of pressure and heavy wind flow and can be geared to the needs of blowing, exhaust and double-rotation reversible mode.
WT35-11型为屋顶轴流式通风机，该风机为中低压大流量风机，可设计成送风、排风或双旋转可逆式。
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