| 摘要 |
PURPOSE: A composite metallic pipe is provided to improve bending strength and reduce manufacturing cost by inserting a synthetic resin product into a metallic pipe. CONSTITUTION: A composite metallic pipe(A) is composed of a metallic pipe(1), and a synthetic resin product(2) formed by extrusion molding and inserted into the metallic pipe. The synthetic resin product has a plurality of grooves(3). An incision unit(5) is longitudinally formed at the synthetic resin product.
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