| 摘要 |
<p>The mobile part of the plug slides along U-shaped guides and is supported by a plate whose distance from the guides can be varied by means of screws. The lower part of the plug is housed in a cavity formed from metal sheet segments on the top of the support plate. The back segments can be turned upside down by means of pivots so that the mobile part can be removed or inserted. The dimensions of this mobile part need not conform to strict tolerances because the distance between it and the guides is variable.</p> |
