Cressi SUB Serie Mode D'emploi page 22

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English 17
exceeded, this valve allows the diver to manually deflate
when his/her position mainly concentrates air in the lower
part of the jacket.
To operate the lower right valve, just pull the cord, by
grasping the special knob which, depending on the
jacket model, is located on the rear side in the lower right
part or on the front side in the lower right part.
To operate the upper right valve, just pull the cord, by
grasping the special knob located on the front side on
the right shoulder-strap.