Libreng serbisyu para keng pamangulkula kareng materyales para keng pamaglalangPamagkwenta king pamagganap ning bentilasyon
Pamagkwenta king dagul ning angin a daralan king sistema ning bentilasyon
F - Air duct cross-sectional shape. Rectangular o mabilug.
D - Diametru ning duct.
X - Lapad ning rectangular duct.
Y - katas ning rectangular a duct.
E - Bilis ning angin, balang segundo.
Program capabilities.
Pamagkwenta king dagul ning angin a daralan king ventilation duct.
Author of the project: Dmitry Zhitov
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