▎ 摘　　要

NOVELTY - Aluminum profile comprises an aluminum tube. The open ends of the aluminum tube are respectively provided with two telescopic angles. The telescopic angles on each open end are set symmetrically. The top of the telescopic angle is provided with a semicircular protrusion. The diameter of the protrusion is 2.8 plus minus 0.1 mm. The two ends of the protrusion are respectively connected with the support bar, and the other end of the support bar is connected with the aluminum tube. USE - The aluminum profile is useful for bimetal composite radiator in reducing the abnormal friction noise caused by the thermal expansion and contraction of the bimetal composite radiator (claimed). ADVANTAGE - The radiator provides a quiet and comfortable environment for users. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of the bimetal composite radiator in reducing the abnormal friction noise caused by the thermal expansion and contraction of the bimetal composite radiator. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of bimetal composite radiator.