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

<specific_platoon_type-creatable-sing>

155mm howitzer

<specific_vehicle_type-pl>

155mm howitzers

<specific_vehicle_type-creatable-sing>

155mm howitzer

<specific_vehicle_type-not_creatable-sing>

155mm howitzer

<specific_platoon_type-sing>

155mm howitzer

<specific_vehicle_type-sing>

155mm howitzer

<specific_vehicle_type-not_creatable-pl>

155mm howitzers

<specific_platoon_type-not_creatable-sing>

155mm howitzer

<specific_vehicle_type-not_creatable>

155mm howitzer

155mm howitzers