The use environment should be kept dry and tidy, and the surface and interior should also be maintained. Avoid the interference of debris and cause damage to the fuselage.2. The axis flow should be defensive in an open -air environment to avoid the moisture of the motor.3. The axis flow can only be operated under normal circumstances, and a special line should be set up.4. If the axis flow occurs during use, if noise and other phenomena, you should stop using it immediately.Find the relevant reasons and solve it to use it.