| 摘要 |
An ID reader 53 is provided at a fall prevention cover 50 of an overhead traveling vehicle 20 for reading an ID 76 on the back surface of an article 70. The ID reader 53 can be protruded from or retracted into the fall prevention cover 50. When the article 70 is elevated/lowered, the ID reader is retracted into the cover 50. When the ID 76 is read, the ID reader 53 is advanced to a position under the article 70.
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