Answer
Matsakaicin lokacin bazara $k$ na maɓuɓɓugar ruwan raƙuman ruwa-zuwa-crest an samo asali ne daga jujjuyawar katako mai lanƙwasa. Ga wani marmaro mai juya $N$ da $n$ taguwar ruwa a kowane juyi, nauyin $P$ ana bayyana shi azaman $P = _x000c_rac{E imes b imes t^3 imes n^4 imes f}{C imes D_m^3 imes N}$, inda $E$ shine Modul na Matasa, $b$ shine kaurin radial, $f$$ shine bangon radial, $f$$ shine $t$_ matsakaicin diamita. Kullum $C$ ya bambanta dangane da yanayin ƙarshe. Ƙarshen Shim yana samar da fili mai faɗi don rarraba kaya, wanda ya ƙara daɗaɗa rabin raƙuman ruwa guda biyu marasa aiki a cikin tari. Yayin da wannan yana ƙara tsayin tsayin $H_s = (N imes t) + (2 imes t_{shim})$, yana inganta layin lokacin bazara a farkon da ƙarshen bugun jini ta hanyar hana 'loading-loading' na kololuwar igiyar ruwa a kan saman mating.
