Street lights in training known as HPS, which is automatically controlled by a component named photo-electric cell (day-light switch) is one of the essential panels for a level one trainee.Next to it is a 3 heat stove switch.
Street lights in training known as HPS, which is automatically controlled by a component named photo-electric cell (day-light switch) is one of the essential panels for a level one trainee.Next to it is a 3 heat stove switch.