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- [5] VACUUM PUMPS IN THE CHEMICAL-INDUSTRY .6. FLUID ENTRAINMENT PUMPS VAKUUM-TECHNIK, 1980, 29 (06): : 163 - 168
- [7] VACUUM PUMPS IN THE CHEMICAL-INDUSTRY .3. OIL-SEALED ROTARY VACUUM PUMPS VAKUUM-TECHNIK, 1980, 29 (04): : 98 - 104
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- [10] USE OF LIQUID RING VACUUM PUMPS FOR VACUUM SHIPPING IN THE FOOD-INDUSTRY VIDE-SCIENCE TECHNIQUE ET APPLICATIONS, 1993, 49 (269): : 419 - 421