My biolod premium cable have broken but no problem with use, so I want to solve the problem
Do you have electrical tape? You can wrap some around the exposed section (like you did twice already).
Or can you use a longer DXL cable? So that it can go a bit more freely above that space between the 2 AX-12s? That may help from getting the cable caught in that area and getting rubbed on that frame part.
커넥터에서 터미널을 빼고 수축튜브로 감싸는것도 좋은방법입니다.
가장 깔끔한건 동일한 길이의 케이블로 교체하는겁니다.