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- [3] Some mechanical and metallurgical aspects of present-day oil-production equipment TRANSACTIONS OF THE AMERICAN INSTITUTE OF MINING AND METALLURGICAL ENGINEERS, 1935, 117 : 399 - 412
- [4] Present-day Designs of 400 kV Cables with Oil-paper, Gas or Synthetic Insulation and Prospects for their Development. RGE, Revue Generale de l'Electricite, 1981, (7-8): : 520 - 529
- [7] PRESENT-DAY LEVEL AND DEVELOPMENT OF SEEDING EQUIPMENT FOR GRAIN, OIL-YIELDING AND LEGUMINOUS PLANTS IN THE CMEA COUNTRIES AGRARTECHNIK, 1979, 29 (10): : 462 - 464