| 摘要 |
The removal prevention device involves a rotatable cylinder (1) which carries an eccentric curve profile (2) is located parallel to the lamp axis and with rotation of the cylinder, the eccentric curve profile jams the lamp screw thread against the socket. The rotatable cylinder with the eccentric curve profile is located outside the lamp screw thread and a window is present in the socket thread through which the curve profile reaches inwards upon rotation and jams the lamp thread. It is also located inside the socket thread and a window is also present in the lamp thread through which the curve profile reaches outwards and jams the lamp thread
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