Tubular products is with two lasting samples of strip high temperature of symmetry

The utility model discloses a tubular products is with two lasting samples of strip high temperature of symmetry, this sample include stretch section and canned paragraph, wherein, the canned paragraph has two sections, is located stretch section's both sides respectively, stretch section includes two stretching bar of parallel arrangement, the canned paragraph is cylindricly, the axis collineation of two cylindric canned paragraphs, two stretching bar are about the axis axial symmetry of canned paragraph, stretch section's sectional area size is less than the sectional area size of canned paragraph, and stretch section's sectional area size value is controlled for worth half of the sectional area size of canned paragraph, stretching bar's cross -section is fan -shapedly, the sectorial centre of a circle is located on the axis, the sample can be by length and the suitable tubular member of radial dimension, and regional at its middle part, the partly pipe wall of cut off obtains with following the bilateral s