Labada En39 iyo EN74 waa heerar soosaarka ahQalabka birta ahWadamada Yurub. The Pipe-ka birta ee suufka ah ayaa inta badan loo isticmaalaa sidii bactiyet the the the the the steel steel-ka-nambarka leh, oo lagu sameeyay iyada oo lagu duubay xariga kulul ee loo maro hawsha.
Heerka EN39 waa heerka Yurub. Heerka wuxuu u baahan yahay in tuubbada birta screeff-ka laga sameeyo kaarboon kaarboon hoose ama bir bir ah. Dhumucda tuubada birta waa 3.2 mm oo waxay aqbashaa weecinta lagu daro ama laga jaray 10%.
Dhanka kale, heerka EN74 sidoo kale waa halbeeg Yurub ah. Waxyaabaha tuubada birta ee loo baahan yahay ee ay u baahan tahay heerka caadiga ah waxay la mid tahay heerka EN39. Qulqulka birta ee birta waxaa looga baahan yahay inuu noqdo 4.0 mm oo uu aqbalo weecinta lagu daray ama laga jaro 10%. Dusha sare waxaa lagu daaweeyaa iyadoo la adeegsanayo istaar-kulul.
Waqtiga Post: Jun-23-2020