Ka ọ dị ugbu a, ngwaahịa ụlọ ọrụ etolitela usoro atọ nke hydroxypropyl methyl cellulose (HPMC), polymer powder (VAE) na hydroxypropyl starch ether (HPS), nwere nkọwa karịrị iri na abuo.Dịka onye mmekọ tụkwasịrị obi, ụlọ ọrụ ahụ na-eji teknụzụ ọhụrụ ...
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