ASTM A320 faahfaahinta Fasalka L7 ee L7 waxay daboolaysaa bir bir-qabad oo bir ah oo loogu talagalay adeegga heerkulka hoose. Daboolkan caadiga ah ee la duubay, been abuur ah, ama noocyo cagaaran, boorsooyin, boolal, iyo bogaqno istcimaal ah oo loo isticmaalo maraakiibta cadaadiska, tuubbooyinka, iyo qalabka.