Building materials and structures

Building materials and structures

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Issuing Agency 103 Central heating gas appliances: Vol. Ill-Gravity ... 103 Unit heaters a€” American standard approval requirements for gas unit heaters (Z21. ... 139 Design and installation of gravity warm air heating system (Manual 5). 75c . ... 139 Service manual for continuous air circulation adjustments (Manual 6). 75c.

Title:Building materials and structures
Author:United States. National Bureau of Standards
Publisher: - 1951


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