Xarkaha birta ah ee birta ah, oo sidoo kale loo yaqaanno xargaha birta aan dhameystirnayn sida xalka xadka xadka waxaa loogu talagalay in lagu soo lifaaqo qalabka wax lagu xiro, xirmooyinka, ku-shirarka, ka-goynta shilalka iyo aaladaha kale ee ulaha.
Dhibcaha | Ballac | Dhumuc weyni | Dhererkiiba midkiiba |
0.18 "- 4.6mm | 0.01 "- 0.26mm | ||
201 202 304 316 409 | 0.31 "- 7.9mm | 0.01 "- 0.26mm | |
0.39 "- 10mm | 0.01 "- 0.26mm | ||
0.47 "- 12mm | 0.014 "- 0.35mm | 30m | |
0.50 "- 12.7mm | 0.014 "- 0.35mm | 50m | |
0.59 "- 15mm | 0.024 "- 0.60mm | ||
0.63 "- 16mm | 0.024 "- 0.60mm | ||
0.75 "- 19mm | 0.03 "- 0.75mm |
Bandhigyada birta ah ee birta ah waa shey fantastik ah sababtuna tahay awooddeeda iyo cimri dhererkeeda. Waxay leedahay awood jabinta aad u sarreeya oo ka dhigaya ikhtiyaar ku habboon codsiyada culus. Bandhigyada birta ah ee birta ah ayaa leh iska caabbinta sare ee xadka ka badan qaababka kale ee birta iyo xargaha caagga ah, taas oo macnaheedu yahay inay muddo dheer ku noolaan doonto deegaanno aan fiicnayn. Waxaan leenahay 3 dhibcood oo bir ah oo bir ah oo bir ah oo bir ah oo bir ah, waa in la ogaadaa in heerarka kala duwan ee bir bir aan fiicnayn ay sifiican ugu fuliyaan jawiga adag marka loo eego kuwa kale.