| 摘要 |
A pneumatic valve device is provided for use with a pneumatically operable device and a storage vessel for pressurized gas at a pressure to operate the pneumatically operable device. It comprises a valve pneumatically connectable to the storage vessel to admit and release pressurized gas into and from the storage vessel; a connecting chamber for pneumatically connecting the valve to the pneumatically operable device to conduct pressurized gas released through the valve to the pneumatically operable device; and a manually operable control operable to release pressurized gas from the valve into the connecting chamber.
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