The rules that use the vocabulary item "brdm" are:

<i_f_v-sing>

anti tank brdm

brdm with a t

brdm with atgm

<specific_section_type-not_creatable-sing>

brdm recon

swa brdm recon

<specific_section_type-creatable-sing>

brdm recon

swa brdm recon

<i_f_v>

anti tank brdm

brdm with a t

brdm with atgm

<specific_section_type-sing>

brdm recon

swa brdm recon