EXPANSION TUBE HAVING SLOPED HOLE

摘要

PURPOSE: An expansion tube having a sloped hole is provided to reduce the elongation deviation of a tube passing through the inside of the expansion tube by making frictional distribution uniform. CONSTITUTION: A tube(40) is inserted into the center of a hollow expansion tube(50). An expansion chamber(30) is formed at the outside of the expansion tube. A plurality of sloped holes(60) are formed at the expansion tube, and reduces the elongation deviation of the tube passing through the inside of the expansion tube.