Ugbu a, akwụkwọ epoxy na ahịa nwere ike kewaa n'ime halogen-free na halogen-free.The halogen epoxy sheet na-agbakwunyere na fluorine, chlorine, bromine, ayodiin, astatine na ndị ọzọ halogen ọcha na-ekere òkè na ire ere retardation. Ọ bụ ezie na halogen. element bụ ire ere, ọ bụrụ na ọ na-agba...
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