Three Lobes Roots Blower, Ring Blower, Rotary Air Blower manufacturer / supplier in China, offering B-Tohin BV7018 Series Water Treatment Roots Blower with Negative Pressure, B-Tohin BV8016 Series Negative Pressure Three Lobes Roots Blower, B-Tohin BV8024 Series Three Lobes Roots Blower with Negative Pressure and so on.