Effect of Friction Contact on Clamping Errors;

Effect of friction on the hydraulic support;

Comparison study of friction of FAS self-ligating bracket and traditional self-ligating bracket;

Formula of friction forces for orthodontics;

Study of friction forces to self-locking bracket developed recently;

Analysis of friction force between multi-lay winding wire ropes;

The paper deduced the calculation formulas of distance between two stabilizers through reasonable simplify,put forward a set of numerical calculation procedure of the frictional force calculation and the stabilizer distribution design of sucker rod string in directional wells,and worked out the appropriate computer programs.

The effect on the face frictional force agginst the destruction to the fracture of the testpiece is studied.

Experiments and analyses are made on the relation between raw silk size and frictional force producing when strand silk passes through the gap of gauge wheel, thus verifying that the finest she of automatically reeled silk is affected by such factors as length of croisure, subtense central distance .

Assuming soil is not drained,the computing formulas of soil vertical deformation induced both by bulkhead additive thrust,force of friction between shield and soil,and force of friction between follow-up pipes and soil are derived from the Mindlin solution in elastic mechanics.

The computing formulas of superimposed load on adjacent level parallel pipe induced both by bulkhead additive thrust,force of friction between shield and soil,and force of friction between follow-up pipes and soil are derived from the Mindlin solution in elastic mechanics.

By assuming that soil is not drained,the computing formulas of ground deformation induced by bulkhead additive thrust,force of friction between shield and soil,and force of friction between follow-up pipes and soil are derived from the Mindlin solution in elastic mechanics.