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硬质钨钢球合金球39.425/39.43/39.435/39.44/39.445/39.45mm钢珠
O型密封圈NBR FKM内径35/36.17/37.77/39.43/40.94/42*线径2.62
39.41 39.42 39.43 39.44 39.45 39.46 39.47 39.48 39.49塞/针规