The rules that use the vocabulary item "swa mech" are:

<specific_platoon_type-creatable-sing>

swa mech

swa mech mortar

<team_or_group_company_echelon>

swa mech heavy combat team

<specific_platoon_type-not_creatable-sing>

swa mech

swa mech mortar

<specific_platoon_type-sing>

swa mech

swa mech mortar