Improvement program use of cone Angle chokes; multi-nozzle chokes and multiple exchange design to extend manifold service life to ensure safety.

The outside of the regeneration section is equipped with multiple layers of regeneration air ring pipes which are communicated with a gas-liquid mixer with a nozzle in the tower.

The utility model discloses a multiple-piece nailing gun nozzle, particularly a gun nozzle assembled on the top end of a nail box of a nailing gun.