Hōʻike ʻia ke apo sealing polyurethane e ka pale ʻana i ka lole, ka aila, ka waikawa a me ka alkali, ozone, ʻelemakule, haʻahaʻa haʻahaʻa, haehae, hopena, a me nā mea ʻē aʻe. Eia kekahi, hoʻolei ʻia ke apo sealing i ka aila kūpaʻa, hydrolysis ...
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