1. Determination of the cylindrical rigidity of plates with staggered perforation

   • G. A. Salomatin

   OriginalPaper Pages: 147 - 150

2. Comparison of characteristics of pulsation-mixing and vibrating-plate extractors

   • M. Z. Maksimenko
   • A. F. Galeev
   • A. I. Gur'yanov

   OriginalPaper Pages: 151 - 154

3. A design method for improving self-acting valves

   • A. I. Borisoglebskii
   • R. V. Kuz'min

   OriginalPaper Pages: 155 - 161

4. Pressure distribution in compressor piston seals

   • S. M. Altukhov

   OriginalPaper Pages: 162 - 167

5. Geometric design of planetary mixers where the blades clean one another

   • É. É. Kol'man-Ivanov
   • F. A. Shklovskaya

   OriginalPaper Pages: 168 - 178

6. Joining the drive shafts of drilling machines through an inflated ring clutch

   • A. A. Antonov

   OriginalPaper Pages: 179 - 184

7. Analytic method of calculating the work done in compacting plastic powders

   • N. F. Kunin
   • B. D. Yurchenko

   OriginalPaper Pages: 185 - 190

8. Results of tests on cavitation-impact colloid mills

   • V. M. Karaulov
   • A. N. Selivanov

   OriginalPaper Pages: 191 - 193

9. Methods of determining the specific resistance of filter deposits

   • V. A. Zhuzhikov

   OriginalPaper Pages: 194 - 196

10. The use of bent elbows and welded joints in high pressure pipe lines

    • A. A. Kurkumeli
    • V. V. Nizkii
    • S. P. Gorbachev

    OriginalPaper Pages: 197 - 201

11. Quality attained in manufacturing parts for the hydraulic portion of U8-3 and U8-4 drilling pumps

    • S. G. Babaev
    • I. V. Shlimak
    • V. G. Stepanyanets

    OriginalPaper Pages: 202 - 206

12. Analysis of designs and development of standardization proposals on open type tricone bits

    • A. A. Khalilov

    OriginalPaper Pages: 207 - 213

13. An efficient method for local protection of drill bit legs from gas carburization

    • K. T. Aliev
    • R. A. Akopov

    OriginalPaper Pages: 214 - 217

14. Intergranular corrosion of piping in urea production

    • I. G. Kharlampiev
    • A. N. Kuzyukov

    OriginalPaper Pages: 218 - 219

15. Modernized ammonia synthesis column PMK-320-6 by-pass valve

    • V. P. Klimov

    OriginalPaper Pages: 220 - 220