Official Answer
Answer
Riga-kafi yana faruwa a musaya inda igiyoyin igiyar ruwa ke haɗuwa a cikin bazarar Crest-to-Crest ko kuma inda ya juyo a cikin bazara mai ƙayatarwa. Ƙarƙashin mita mai girma, ƙaramar girgizar ƙasa, matsa lamba na gida da motsin dangi na ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun oxide na bakin karfe, wanda ke haifar da lalacewa da 'lalata' (sau da yawa ana gani a matsayin foda ja ko baki). Wannan yana rage kaurin kayan $t$, wanda ke rage girman nauyin kaya ($P ∝ t^3$) kuma yana haifar da tashin hankali wanda ke haifar da gajiya. Lubrication tare da busassun fim ɗin molybdenum disulfide ko ƙayyadadden sutura masu ƙarfi na iya rage wannan a aikace-aikace masu ƙarfi.
