It has multiple holes and then flows through another bit. The holes appear to be a lot smaller than the non pressurised example several posts up.
TA DAHHH - http://protofusion.org/wordpress/2010/02/depressurizing-the-ec-155-portafilter/
@Scrabble started
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It has multiple holes and then flows through another bit. The holes appear to be a lot smaller than the non pressurised example several posts up.