I. Atụmatụ: 1. upvc ọkpọkọ, makwaara dị ka ike polyvinyl chloride pipe, u-pvc pipe, bụ ụdị siri ike corrosion eguzogide, acid, alkali nnu mmanụ ọkara mbuze eguzogide, ìhè arọ, a ụfọdụ n'ibu ike, ezi hydraulic ọnọdụ. , adaba echichi, ma mfe ịka nká, elu te ...
GỤKWUO