1. Gịnị bụ isi ngwa nke hydroxypropyl methylcellulose (HPMC)? ——Azịza: A na-eji HPMC eme ihe n'ọtụtụ ebe na ihe owuwu, mkpuchi, resins sịntetik, ceramik, ọgwụ, nri, akwa, ọrụ ugbo, ịchọ mma, ụtaba na ụlọ ọrụ ndị ọzọ. Enwere ike ikewa HPMC n'ime: ọkwa ihe owuwu, foo...
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