Re etsa bonnete ba hore thomello e 'ngoe le e 'ngoe e tsamaisoa ka mokhoa o sireletsehileng ka li-slings tsa rona tsa maemo a profeshenale, tse tsamaellanang le litekanyetso tse kholo tsa machabeng ho kenyeletsoa lintlha tsa US (ASME), EU (EN), le Japanese (JIS). Sehlopha sa rona se fana ka litharollo tsa ho phahamisa tse ikhethileng bakeng sa balekane ba lefats'e, ho netefatsa polokeho, ts'epahalo, le ho nepahala ts'ebetsong e 'ngoe le e' ngoe e boima ho tloha ho raging le ho phunya ho isa thepa e sireletsehileng ea lipalangoang.