000 00282 a2200121 4500
082 _a620.172
_bEn33v
245 1 _aVACUUM PRODUCING EQUIPMENT
260 _aLondon
_bConstable
_c1961
300 _a99
440 _aE. E. U. A. Handbook
_vNo. 11
964 _gCIRC
997 _a12614 C
999 _c452682
_d452682