000
00282 a2200121 4500
082
_a
620.172
_b
En33v
245
1
_a
VACUUM PRODUCING EQUIPMENT
260
_a
London
_b
Constable
_c
1961
300
_a
99
440
_a
E. E. U. A. Handbook
_v
No. 11
964
_g
CIRC
997
_a
12614 C
999
_c
452682
_d
452682