Preview Of BIF Heavy Industries Show At Birmingham. The press were today given a preview of the heavy industries section of the British Industries Fair, which will open on Monday concurrently with the BIF Exhibition at Olympia, London. A strike among a section of the workmen engaged in the erection of the Birmingham show, may cause the fair to open on Monday, with some of the stands incomplete. Photo show: 1.5 ton benzole-driven "Frog Rammer" for packing down kiise earth etc, seen at the exhibition today. Makers C.H. Johnson, Adwood Road, Stockport. Birmingham, England. 29 April 1949.