Ma waho aʻe o ka wai, ʻo ka hapa nui o ka media i hoʻohana ʻia i ka pā wela wela he hopena lean, waiwai waiwai, sodium hydroxide, sulfuric acid a me nā mea ʻenehana ʻē aʻe, e maʻalahi ke kumu o ka corrosion o ka pā a me ka pehu a me ka ʻelemakule o ka gasket. ʻO ka pā a me ka gasket nā mea nui o ka hoʻololi wela o ka pā ...
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