Barricades should be erected on the approaches and in the hours of darkness , warning lights must be in position and maintained in an operating condition 在靠近危险的地方必须设置障碍，在夜间必须放置警示灯，并使其保持工作状态。
While you are changing the tire , you have to keep your hazard lights blinking or have a friend wave a brightly colored flag to warn other cars that you are there 你在换胎时，警示灯必须持续开着，或者请朋友挥舞一面色彩鲜艳的旗子，警告其他来车你们在那里。
Since the company in 1999 to set up has been committed to the led display , the countdown , solar traffic lights , parking traffic lights , traffic lights charges , yellow flashing warning lights , and other product research , design , development , production and sale 自公司1999年成立以来一直致力于led显示屏、倒计时、太阳能交通灯、停车场交通灯、收费交通灯、黄闪警示灯等产品的研究、设计、开发、生产及销售。
Ningbo senyong electronic technology co . , ltd specializes in the production of movable - ring telephone receivers , automatic swithing devices for vehicle - mounted mobile phone , multi - purpose tripod caution lamp , information telephone sets and business telephone sets 宁波森永电子科技有限公司专业生产各种规格、型号的动圈式受话器；车载手机转接器；多功能三角警示灯；来电显示电话机、信息电话机、商务电话机。
Famous for inventing and holding the original patent on the reverse motion alarm used in heavy transportation equipment , preco has evolved into a diversified organization that serves a broad base of customers in the heavy equipment and commercial vehicle markets 用于重型机械和商用车市场。其产品系列有：各式的警报器蜂鸣器闪光灯及旋转警示灯等。上海鹰琪自动化成套设备有限公司系preco公司中国区代理，竭诚为广大客户服务。
