Turashobora gutanga ubwoko bwose bwibyuma bidafite ibyuma bishobora guhura na EN877, DIN19522, kandi nibindi bikoresho byihariye bishobora gutangwa.Urutonde rwuzuye rwa EN877 rushyizwemo ibyuma ni kuva DN50 kugeza DN300.Usibye EN877 isanzwe ikora ibyuma bikwiranye nkibigoramye, amashami, imipira a ...
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