Xi¨ºn 4 nh¨¢y im ni bt ca ¨¢ g¨¤ ca st so vi c¨¢c h¨¬nh thc ¨¢ g¨¤ truyn thng l¨¤ vic s dng ca st, mt loi ca kim loi c gn v¨¤o chn g¨¤. Ca st gi¨²p tng s¨¢t thng trong c¨¢c trn u, khin cho mi pha tn cng tr n¨ºn quyt lit v¨¤ nguy him hn. Nm r c¨¢c thng tin li¨ºn quan n sn phm trc khi tham gia u t Mc Lc T¨¬m s tim nng theo tng Kt lun N¨°i: Loi n¨¤y c¨® ngun gc thun chng, s hu ngoi h¨¬nh khe mnh, xng ct rn chc v¨¤ c¨® kh nng chin u cao. 1 ¨C 10 0 ~ 108 im Mi trn u ¨¢ g¨¤ ca st u i k¨¨m vi nhiu loi k¨¨o c¨¢ cc kh¨¢c nhau, t ¨® to ra s hp dn cho nhng ai y¨ºu th¨ªch c¨¢ cc. T¨¤i: Ngi chn s thng nu tng s im ca ba vi¨ºn t¨²c tc t 11 n 17. Ca T¨¤i: Khi tng im 3 vi¨ºn t 11 n 17. t 100 im thu v 100. Theo ITTF, b¨®ng t chun ¨²ng lut chi b¨®ng b¨¤n phi c¨® c¨¢c c im sau:

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