| 摘要 |
PURPOSE: A steel tube-type pipe is provided to enhance rigidity of an outer tube by filling a filler material in a hollow portion between ribs. CONSTITUTION: A steel tube-type pipe(A) comprises an outer pipe(1), an inner pipe(2), a plurality of ribs(10), and reinforcing ribs(5). The plurality of ribs is formed to form the inner pipe in the inner area around the outer pipe. The reinforcing ribs are formed at the top-end part of the rib, and the high intensity of the rib is guaranteed.
|
