Hydroxypropyl methylcellulose (HPMC) ndi polima wosunthika yemwe amagwiritsidwa ntchito m'mafakitale osiyanasiyana, kuphatikiza zomangamanga, komwe amapeza ntchito mu gypsum grouts. Gululi limagwira ntchito yofunikira pakupititsa patsogolo magwiridwe antchito a grout, kuthandiza kukonza magwiridwe antchito, kumamatira ...
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