· pren 12779:2004 (e) figure 4 — examples of duct access for inspection and cleaning ducts,...
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- · 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
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Post on 09-Jan-2019
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