Makina opopera a polyurethane ali ndi mitundu iwiri ya nozzles: nozzel ndi kuponyera nozzel.Pamene kupopera nozzle ntchito, polyurethane kupopera makina ndi oyenera kuponyera zowotchera madzi dzuwa, ozizira madzi, odana ndi kuba zitseko, madzi nsanja madzi akasinja, firiji, wat magetsi ...
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