The category "<a_a_v-sing>" can be expressed as follows:

<a_a_v-sing>

aav

aav command

aav command group

aav command team

aav miclic

aav-c7

aav-r7

amphibious assault vehicle

amphtrac

amtrac

c2aav

lvt-c7

lvt-p7

lvt-r7

mine aav

mine clearing aav