| 摘要 |
A spray coating apparatus includes a spray gun which contains a piston pump operated by the pressure responsive fluid actuator having a hollow, flexible, thin-walled shell defining a pneumatic fluid chamber of variable volume for pressurizing fluent material delivered to the gun nozzle. A control circuit operates a nozzle valve in timed relation to the operation of the pump to intermittently release streams of coherent fluent material through the nozzle.
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