Inside Out Library · Explore
Reliable vacuum and vacu-vapor heating equipment (1915)
The Bishop-Babcock-Becker Co. · The Bishop-Babcock-Becker Co. · leaf 61
*+D, Vt/Heating units · Vacuum-tube collectors · HVAC ducts and casings
Internet Archive · Building Technology Heritage Library · Public Domain Mark 1.0. Free to use for anything.
More pictures from Reliable vacuum and vacu-vapor heating equipment
More like this
