The submarine surfaced suddenly and flashed a signallamp at the ship indicating an imminent attack.
那艘潜水艇突然浮出水面，对着这条船闪着信号灯，表明攻击在即。
2
Install turn signallamp bulb.
安装转向信号灯灯泡。
3
This paper concerns mainly: 1. From the principle of accelerated reliability test, a practical ageing method of signallamp bulbs for basic unit use is proposed.