中南大学Chapter 5 Screw joints and screw drive51 Screw thread52 Types of Screw thread and Standard joint53 Pre-tightening of screw joints55 Strength calculation of screw joint57 Material and admissible stress of screw bolt58 Measures of improving intensity of screw bolt joint 59 Screw drive54 Looseness preventing of screw joint56 Design of joint of screw bolt group中南大学 Forming of screw thread51 Screw threadd2Helical line-the locus of a moving point which rotates around axis ,and at the same time mov
