00379nam a22001337a 450000500170000000800410001702000080005804100080006608200180007410000200009224500610011226000580017330000140023120260619130246.0260619b        |||||||| |||| 00| 0 eng d  a000  aeng  a621.84bPEA/A  aPearson, G. H.   aApplications of Valves and Fittingsc/ by G. H. Pearson   aGreat Britain bSir Issac pitman and Sons Ltd. c1968  av, 273p.