He aha ka GRC?Ua like ka GFRC me ka fiberglass ʻokiʻoki (ke ʻano i hoʻohana ʻia no ka hana ʻana i nā hull waʻa a me nā ʻano hiʻohiʻona ʻekolu paʻakikī), ʻoiai ʻoi aku ka nāwaliwali.Hana ʻia ma ka hoʻohui ʻana i ka hui ʻana o ke one maikaʻi, sima, polymer (maʻamau he polymer acrylic), ka wai, nā mea hoʻohui ʻē aʻe a me ka alkali-resistant (AR) gl...
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