ISO 10303-21 standard STEP STEP File – ISO 10303-21 STEP English ISO 10303-21 File Format (STEP) (.stp, .step) STEP file ISO 10303‑21 or STEP format http://en.wikipedia.org/wiki/ISO_10303-21 STEP http://en.wikipedia.org/wiki/ISO_10303-21 ISO Standard http://en.wikipedia.org/wiki/ISO_10303-21 ISO Standard STP http://en.wikipedia.org/wiki/ISO_10303-21 English STEP file http://en.wikipedia.org/wiki/ISO_10303-21 STEP Physical File STEP http://en.wikipedia.org/wiki/ISO_10303-21 STEP file STEP "ISO 10303-21" STP ISO10303-21 STEP File – ISO 10303-21 ISO 10303-21 standard http://en.wikipedia.org/wiki/ISO_10303-21 Step files STEP http://en.wikipedia.org/wiki/ISO_10303-21 STEP STEP http://en.wikipedia.org/wiki/ISO_10303-21 STEP files http://en.wikipedia.org/wiki/ISO_10303-21 STEP STEP https://en.wikipedia.org/wiki/ISO_10303-21 http://en.wikipedia.org/wiki/ISO_10303-21 STEP files ISO Standard http://en.wikipedia.org/wiki/ISO_10303-21 STP en