00832cam a2200289 4500 1706082 BD-DhUL 20150114115251.0 680301s1968 enka b 000 0 eng 68084699 B68-01939 DLC DLC DLC ICU BD-DhUL TJ940 .D42 621.55 DEV Dennis, N. T. M. Vacuum system design / by N. T. M. Dennis and T. A. Heppell. London : Chapman & Hall, c1968. iii-xi, 223 p. : ill. ; 25 cm. 50/- High vacuum series Includes bibliographies. Vacuum pumps. Vacuum technology. Heppell, T. A., joint author. 7 cbc orignew u ncip 19 y-gencatlg ddc BK 30808 30808 0 0 ddc 0 621_550000000000000_DEV 0 NFIC 58293 DUSL DUSL GEN 2015-01-14 gift 621.55 DEV A61293 2015-01-14 2015-01-14 BK