(A)0.6kg; (B)0.65kg; (C)0.75kg; (D)0.85kg
(A)100mm; (B)200mm; (C)300mm; (D)400mm
(A)錘頭質(zhì)量(kg); (B)錘頭質(zhì)量(g); (C)錘手柄長度(in); (D)錘手柄長度(mm)