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- [17] THE SYSTEMATIC DESIGN OF MANUALLY OPERATED FINE ADJUSTMENTS F&M-FEINWERKTECHNIK & MESSTECHNIK, 1982, 90 (06): : 313 - 318
- [18] VALVE MISASSEMBLY - MANUALLY OPERATED RESUSCITATION BAG ANESTHESIA AND ANALGESIA, 1981, 60 (01): : 66 - 67
- [20] Manually operated tomato harvesting tool for greenhouse Proceedings of the International Symposium on Greenhouses, Environmental Controls and In-House Mechanization for Crop Production in the Tropics and Sub-Tropics: CONTROLLED ENVIRONMENT PRODUCTION SYSTEM FOR SUSTAINABLE AGRICULTURAL PRODUCTION, 2006, (710): : 491 - 495