ʻO ka paipu Spiral (SSAW) he paipu kila kalapona wiliwili i hana ʻia me ka ʻili kila ma ke ʻano he mea maka, hoʻokuʻu pinepine ʻia me ka pumehana, a wili ʻia e ke kaʻina hana hoʻoheheʻe arc lua-ʻaoʻao. Hoʻohana nui ʻia ia i ka ʻenehana lako wai, petrochemical, kemika, mana uila, agricultur...
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