Mmepụta ihe ọhụrụ n'azụmahịa
Kemgbe ọtụtụ afọ, n'ihe gbasara nkà ihe ọmụma nke "Ịdị Mma, Nduzi Teknụzụ", ụlọ ọrụ ahụ emepụtala phosgene mmiri dị ọcha ma mepụta ihe na-agwọ tetraisocyanate (7900#), TPPT dị elu (tetraisocyanate phenyl ester) cro...
lee nkọwa zuru ezu