From the curve of load-displacement,the T-joints can be referred to as full rigid joints,and their bending capacities can assure the strength of the members connected under certain limitations,h.

In order to study the bending capacity and bending rigity of tubular T-joint,the full scale model member tubular T-joint are tested.

This paper presents a hidden lines removing algorithm for intersecting objects composed of basic convexes and concaves.

This article researches deeply and deals with properly the intersection of hypersurfaces of the 5—dimensional space and the visi- bility problem of the intersection shape,this makes the projection clear,audio—visual and hace a good presentating effet.

Numerical control cutting of welding groove for intersecting of pipe and cone;

Establishing the Chart of Intersecting Cylinder and Cone Based on Aspect Graph;

The research is launched for studying the numerical control system of a kind of intersecting line cutting machine.