The rules that use the vocabulary item "155mm howitzer" are:

<specific_platoon_type-creatable-sing>

155mm howitzer

<specific_vehicle_type-sing>

155mm howitzer

<specific_vehicle_type-creatable-sing>

155mm howitzer

<specific_platoon_type-not_creatable-sing>

155mm howitzer

<specific_vehicle_type-not_creatable-sing>

155mm howitzer

<specific_platoon_type-sing>

155mm howitzer

<specific_vehicle_type-not_creatable>

155mm howitzer