Ballsaukar ƙwallan ƙarfe suna da Grade da yawa. Dangane da jerin maki a tsarin kasa GB / T308-2002, an kasa su zuwa G5, G10, G16, G28, G40, G60, G100, G200, G500, G1000, da dai sauransu G shine harafin farko na Grade a Turanci , kuma lambobi masu zuwa suna da matakai daban-daban. Smallerananan ƙananan
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