| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively provide a door body excellent in architectural-design properties and equal or superior to the door body of a drop-in type, having the member composition wherein the number of components is reduced. SOLUTION: The door body is constituted by inserting and fixing an architrave having an asymmetrical cross section into a recessed groove part engraved in a rectangular shape in the inward position of the flat surface of the door body.
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