ʻO DLF triangle tube ʻauamo nā mea hoʻoili mana hilinaʻi no nā trak. Hana ʻia ma Yancheng, Kina, hele mai kēia mau ʻauamo melemele-ʻeleʻele i nā ʻano paipu like ʻole a hana ʻia a hoʻolei ʻia no ka lōʻihi. E hoʻomaikaʻi i ka hana tractor me nā ʻauamo paipu DLF.