div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader043fdocumentsnetreader043viewer20220221115c35f13f09d3f27e1e8b555ehtml5page1jpg target=_blank img data-url=document-pren-127792004-e-figure-4-examples-of-duct-access-for-inspection-andhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: · prEN 12779:2004 E Figure 4 — Examples of duct access for inspection and cleaning Ducts branch ducts inspection doors dampers blast-gates fire-gates etc in ducting conveying loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsnetreader043viewer20220221115c35f13f09d3f27e1e8b555ehtml5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader043fdocumentsnetreader043viewer20220221115c35f13f09d3f27e1e8b555ehtml5page2jpg target=_blank img data-url=document-pren-127792004-e-figure-4-examples-of-duct-access-for-inspection-andhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: · prEN 12779:2004 E Figure 4 — Examples of duct access for inspection and cleaning Ducts branch ducts inspection doors dampers blast-gates fire-gates etc in ducting conveying loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader043fdocumentsnetreader043viewer20220221115c35f13f09d3f27e1e8b555ehtml5thumbnails2jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader043fdocumentsnetreader043viewer20220221115c35f13f09d3f27e1e8b555ehtml5page3jpg target=_blank img data-url=document-pren-127792004-e-figure-4-examples-of-duct-access-for-inspection-andhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: · prEN 12779:2004 E Figure 4 — Examples of duct access...