A cikin 'yan shekarun nan, a cikin tsarin filastik, hanyar da aka fi sani da yin amfani da ita, ita ce sarrafa filastik. Roll gyare-gyare, kuma aka sani da Rotary gyare-gyare, Rotary gyare-gyare, hanya ce ta thermoplastic molding. Roll gyare-gyaren ya samo asali ne a cikin 1940s a cikin United Kingdom, yin gyare-gyaren nadi ya fito a cikin 188 ...
Kara karantawa