... the Impedance complex muffler, the noise of our blowers are further reduced. 2. High volume and anti ... to make it more balance. Therefore, the blowers are almost no vibration.5. With high precise ... and hardness Synchronization gear, we not only extension blowers life, but also reduce its noise.6. Our ... moreover, and highly increase the life of the blowers.16.Mercury column detecor: we test the air ...