Because of the large items. Unable to pack into one package. Plant engineers are required to separate the components so that the Pack is vertical. If it is a single-Pack package will need to pack the landscape.
Due to its large You can pack into a single package. Plant engineers will need to pack a separate component vertical. If you pack a single package will have to pack horizontal.
Since the goods are large. Can't pack is a single package. Engineer will need to disassemble the machine to pack is vertical. If the pack is a single packet to pack a horizontally.