The twist-related locomotion function was firstly solved, and simplified to be expressed by sine or cosine functions.

In this paper, we derive the homeomorphic classes of graphlike manifold with contraction [CRL(10*4/5,3),PY] ? by means of twist operation.

For a graphlike manifold whose contraction is a generalized cuneate figure,we deribve a formula in this paper to compute the number of homeomorphism classes of it by using twist operations and the combinatorial theory.

5mm] (2n vertices )  is developed with the twist operation and the combinatorial theory.

Conditions of Effect of Screw Torsion Deformation to Transmission Rigidity;

Bar DZ4 specimens after torsion deformation were heat treated at 1220℃for 4 hours in order to obtain recrystallization layer at the surface,and low cycle fatigue property experiments to the specimens after heat treatment were carded out.

By the thin shell theory the fundamental equations for axisymmetrical torsional deformation Of conical shells are investigated, the analytical formulas of stresses and displacements are derived, and for the truncated conical shell with rigid roof under the torsional couples an exact solution is given.

Eccentric loadings will induce large torsional deformations for the girders of long-span bridges,deteriorating the safety and comfort of moving vehicles of rail transit.