00542nam a22001577a 4500 1005 1005 200106b ||||| |||| 00| 0 eng d 621.18 H6328 573 Hider, G. E. The problem of fluctuating loads on boilers : an investigation into the characteristics of different types of boilers, their effect on production costs and the influence of thermal 1st London Charles Griffin 1931 vi,113p. 5.09 Steam Boilers BK 0 0 ddc 0 621_180000000000000_H6328 0 3301 CL CL 1952-10-30 Progressive 621.18 H6328 00676 2020-01-06 BK