The image shows a hand-drawn technical sketch, likely for ventilation or air conditioning, on graph paper. The sketch includes various dimensions and labels, such as "12,00", "1000", "500", "1600", "2300", and "300". Specific components are labeled "F9", "F", "E~73", and "4,3". The text "EVB 20 HIE Долно обслужване" is written at the bottom. The top left of the image features the logo of "ТАНГРА", a company specializing in ventilation, air conditioning, and heating. The company's Sofia address is listed as "бул. Европа № 174".

Morning documentation of artwork and cal

IMAGE

Dodo13

Creator

Tue, May 26, 2026, 06:28 AM

4d ago

Sofia, Bulgaria

42.74100, 23.23800

The image shows a hand-drawn technical sketch, likely for ventilation or air conditioning, on graph paper. The sketch includes various dimensions and labels, such as "12,00", "1000", "500", "1600", "2…read more

technical

blueprint

planning

engineering

design

Technical

47677939-26f8-4e6a-b

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