The rules that use the vocabulary item "37mm" are:

<i_f_v-sing>

37mm anti air artillery

37mm anti air machine gun

37mm triple-a

opfor 37mm

swa 37mm

swa 37mm aamg

<i_f_v-pl>

37mm anti air artilleries

37mm anti air machine guns

37mm triple-as

swa 37mm aamgs

<i_f_v>

37mm anti air artilleries

37mm anti air artillery

37mm anti air machine gun

37mm anti air machine guns

37mm triple-a

37mm triple-as

opfor 37mm

swa 37mm

swa 37mm aamg

swa 37mm aamgs