| 摘要 |
PROBLEM TO BE SOLVED: To provide an insert instrument without interfering with a bar body in a small concrete structure. SOLUTION: A male screw part 1a is formed on the inner periphery of an insert body 1 formed cylindrically by ceramic, a spiral projection part 1b is formed on the outer periphery of the insert body 1, and one end of a cylindrical sleeve 3 is connected to one end of the insert body 1.
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