全部

1·When the gauge is placed over the thread of the cap on a finished lamp, held cap uppermost, the centre contact shall not project beyond surface X.

当量规套在成品灯(灯头向上)的灯头螺纹上时，灯头中心触点不应凸出量规的X面。

2·When the gauge is placed over the thread of the cap on a finished lamp, held cap uppermost, the centre contact shall not project beyond surface X.

当量规套在成品（灯头向上）的灯头螺纹上时，灯头中心触点不应凸出X面。

3·When the gauge is placed over the thread of the cap on a finished lamp, held cap uppermost, the central contact shall not project beyond surface X.

当量规套装成品灯(灯头向上)的灯头螺纹上时，灯头中心触点不凸出X面。