I. Ibiranga: 1. umuyoboro wa upvc, uzwi kandi ku izina rya polyvinyl chloride ikomeye, umuyoboro u-pvc, ni ubwoko bwokurwanya ruswa, aside, amavuta yumunyu wa alkali irwanya isuri, uburemere bworoshye, imbaraga zumukanishi, imiterere myiza ya hydraulic , kwishyiriraho byoroshye, ariko byoroshye gusaza, hejuru te ...
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