YYP135 Falling Dart Impact Tester inoshandiswa pakuyera simba remugumisiro wekudonha kwedart kubva pakukwirira kwakati vachipesana nemafirimu epurasitiki nemapepa ane ukobvu huri pasi pe1mm, izvo zvingakonzera kutadza kwe50% kwesampuli yakaedzwa.
