... airflow i BQG-100/0.3 Pneumatic Membrane PumpPneumatic Membrane Pump is easy to operate, reliable, portable with low noise, ... and rib drill. No danger of electricity.The pneumatic membrane pump (nonmetal cover) is the only product obtained the Safety ... damageable components, simple structure, and easy to maintain;c. Idle seal, no leakage position;d. Wearable material, innocuity, with power ...