Keywords: Daw Catalogue Patent Compressor Tracts vol 9 p166.jpg North of England Institute of Mining and Mechanical Engineers It is reference Tracts vol 9 p166 The scan and the upload to Wiki Commons have been made with the permission and direction of their librarian Jennifer Kelly 2013-12-10 12 06 31 A Z Daw London catalogue page 2 Tracts 9 page 166 A Z Daw London Custom license marker 2013 12 10 PD-old-70-1923 PD-US Uploaded with UploadWizard North of England Institute of Mining and Mechanical Engineers Air compressors Mechanical engineering in the United Kingdom |