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Building and Engineering Catalog 1921 Edition (1921)
Specification Data, Limited · Specification Data, Limited · leaf 181
B. 40. Spir-Gear Chain-Blocks. B. 401. OvERrfEAD Runways, B. 402. Garage Lirn.NG-EyciPMEST.Building and engineering specifications · Construction companies · Building material manufacturers
Internet Archive · Building Technology Heritage Library · Public Domain Mark 1.0. Free to use for anything.
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