Our company has six types of machinenumbers：
NO4,4.5,5,5.6,6,6.3,7.1
This fan can be madeinto two types: right-handed andleft-handed.The impelle rrotates cdockwise and is called a right cyclone.Represented by "right",the impeller rotates counterclockwise and is called a left coyclone, representedby "left".
The outlet position ofthe fan is represented by the outlet angle of the casing.and is made into a direclional angle.
The transmision mode of the fan is type A.