| 摘要 |
PROBLEM TO BE SOLVED: To mount a variety size of packages suitable for a circuit scale by attaching a plurality of backpanels on different positions each other depending on the size of assembled packages. SOLUTION: The plurality of backpanels 20, 30, and 40 are attached on the different positions each other within a unit frame 11 of a unit 10 corresponding to the size of assembled packages 50, 60.
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