... 3 Pneumatic Membrane PumpPneumatic Membrane Pump is easy to operate, reliable, portable with low noise, highly ... d. Wearable material, innocuity, with power applicability to other material, no rustily and empoison danger, ... running, no dead center, low air consumption;f. Perfect self-absorption, do not need inverse ... Do not need special person to watch, it is easy to operate without danger;h. It can ...