ʻO nā mea haʻahaʻa haʻahaʻa halogen-free polyolefin he mea koʻikoʻi i ka hana ʻana i ke kelepona optical, ʻoi aku hoʻi ma nā wahi me nā koina palekana ahi kiʻekiʻe, e like me nā subways, tunnels, nā hale kiʻekiʻe, nā ʻōnaehana mana, a me nā mea ʻē aʻe, ʻaʻole hiki ke hāʻawi wale i nā mea e pono ai. nā hana kamaʻilio, akā e hōʻemi pū i ka hoʻoweliweli i ka palekana o nā limahana a me ke kaiapuni i nā kūlana pilikia!