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| 单词 | machine screw |
| 释义 | machine screwnoun A fastening device similar to a bolt but having a socket in its head which allows it to be turned with a screwdriver.Participants were asked to search for a small metal screw (No.2 machine screw, 5 mm diameter) to the right of a circular indentation that was positioned to lie in the middle of the fingertip....
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