| 摘要 |
PURPOSE: An assembly type strong interior pipe is provided to simplify the process of manufacture as well as to reduce the cost of manufacture, and to enable a user to freely manufacture the interior pipe into a desired shape. CONSTITUTION: The interior pipes capable of substituting an assembly type iron angle product consists of a connection outer pipe and a connection inner insertion pipe of male or female type. The interior pipes are manufactured by selecting a desired connection shape of the interior pipes, inserting a socket of one connection inner insertion pipe into both facing holes of both pipes, and locking them by coupling bolts through holes formed at the pipes. Each interior pipe is formed by using an injection molding method.
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