Silsilada 20A-1/20B-1 labaduba waa nooc silsilad rullaluistu ah, waxayna ku kala duwan yihiin inta badan cabbirro kala duwan. Waxaa ka mid ah, garoonka magaca ee silsiladda 20A-1 waa 25.4 mm, dhexroorka usheeda dhexe waa 7.95 mm, ballaca gudaha waa 7.92 mm, ballaca dibaddana waa 15.88 mm; halka dhererka magaca ee silsiladda 20B-1 uu yahay 31.75 mm, dhexroorka shafkana waa 10.16 mm, ballac gudaha ah oo ah 9.40mm iyo ballac dibadda ah oo ah 19.05mm. Sidaa darteed, markaad dooranayso labadan silsiladood, waxaad u baahan tahay inaad doorato sida waafaqsan xaaladda dhabta ah. Haddii awoodda la gudbinayo ay yar tahay, xawaaruhu waa sarreeyaa, booskuna waa cidhiidhi, waxaad dooran kartaa silsiladda 20A-1; haddii awoodda la gudbinayo ay weyn tahay, xawaaruhu waa yar yahay, booskuna waa ku filan yahay, waxaad dooran kartaa silsiladda 20B-1.
Waqtiga boostada: Agoosto-24-2023