asalvo TRIO ROMA II Manual De Instrucciones página 38

Stroller can be folded with or without mounted seat unit.
To fold the stroller, apply the parking devices. Press the button on
stroller's handle. While you are pressing the button, press other but-
ton of locking mechanism in direction. Press the handle to the front,
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until you hear a click and the stroller is fully folded.
FOLDING OF STROLLER
ATTENTION! Make sure that the child is at a safe
distance from the stroller during folding and unfol-
ding.