Plantas industriais "Sketch Showing Air & Gas Colecting Pipes & Calandria Drain Pipes in Vessels. Fábrica do Torreão. Scale: 1 1/2 = 1 foot" e "Wrot Iron Tubes for Reduced Steam to Calandrias of Quadruple Effect", Blairs Limited, Glasgow (n.º 21.174 e 21.231)
1931-10-01
