彩票平台

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                彩票平台

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                            • 型号: 691
                            • 密封类型: 开式
                            • 内径 (d): 1
                            • 外径 (D): 4
                            • 宽度 (B): 1.6
                            • 基本额定动负荷 Cr(N): 120
                            • 基本额定静负荷 Cor(N): 30