There are a number of waste collection vehicles transport 15 country by freight collect solid waste per day 3 morning flight, afternoon and evening, in which all areas are vehicle category 3 waste.
With 15 units, solid waste collection and solid waste will be collected at day 3 in the morning, afternoon and evening, all areas will have the 3 types of garbage.
A garbage collection, the 15 cars. The garbage collection, a 3 out the morning, afternoon and evening, all of which are a waste collection area and 3 types.