"They bring a coat."

Translation: Mereka membawa mantel.

[MaximilianoJ.]

Why not....Mereka membawa satu mantel...?

[Away54]

Yes, "Mereka membawa sebuah mantel" also refers to "Mereka membawa satu mantel." In English, we can say "They bring a coat" or "one coat", right? :))

[Anna604889]

They bring a coat with them. They do not transport coats

[Womba0]

Isn't 'They bring coats' more likely?