20 # Umuyoboro udafite icyuma
Ibisobanuro bigufi:
Ibisobanuro ku musaruro ：
Diameter yo hanze y'umuyoboro w'icyuma 20-426
Urukuta rw'icyuma rufite uburebure bwa 20-426
20 # umuyoboro wicyuma udafite icyerekezo gikozwe muri 20 # ibyuma, bifite imbaraga zisumba gato 15 #, ntibikunze kuzimya kandi nta n'ubushyuhe bukabije.Ubukonje bwo guhindura ubukonje buri hejuru, muri rusange kubunama, kalendari, kunama no gutunganya inyundo, imikorere yo gusudira yo gusudira arc no gusudira ni byiza, ubunini bwo gusudira gazi ni buto, imiterere y'ibisabwa bikomeye cyangwa imiterere igoye y'akazi biroroshye gucika .Imashini ikonje ishushanya cyangwa ibisanzwe leta iruta annealing leta, mubisanzwe ikoreshwa mugukora stress nke hamwe nuburemere bukabije bwibikorwa byakazi.
Ibikoresho bya 20 # ibyuma bidafite icyuma ni: ibyuma byiza bya karubone byubaka
Umubare wikirango: 20 #
Bisanzwe: GB8162-2018
GB / T8163-2018
GB3087-2008
GB9948-2013
GB5310-2017
