[arch-general] Replicating a package set on a new machine

Folks: Assume I've installed a bunch of packages manually on machine A. Now I want to install those same packages-- not manually-- on machine B. I can have pacman tell me what packages are installed on machine A. Now, can I take the package list from machine A and, in an automated way, have pacman then install those packages on machine B? If so, how? Paul