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Fig. 8 When the pushing lever returns after driving a nail in the single actuation
(single sequential actuation) mode
When the switching device is set to the single actuation
mode, the compressed air cannot be released from the
upper portion of the piston and the air passage until the
trigger is released because the valve exhaust vent II is
blocking even if only the pushing lever returns. Therefore,
the piston is kept at the lowermost position and the next nail
cannot be driven.
