Meaning of word

Jin_HWhat is the meaning of mate here? I guess it means join.

Correct.

Jin_HIs it the obvious?

Yes. set = group

CJ

I'm confused as to why they use sets here. Wouldn't it be better if they put "6-car permanently mated articulated train"? And also does mate here mean there's a particular way of joining them or does it simply means joined?

I'm confused as to why they use sets here. Wouldn't it be better if they put "6-car permanently mated articulated train"? And also does mate here mean there's a particular way of joining them or does it simply means joined?

I'm at the disadvantage of not having a picture of what this train looks like, but from the information given, I suspect that each six cars are somehow held together as a unit, called a set, and many of these six-car sets can be connected to make 12-car, 18-car, and 24-car trains, depending on how many are needed in any given area or at any given time of day.

I suspect, in other words, th