亚洲日韩精品午睡沙发 INA BK4520闭式冲压外圈滚针轴承尺寸图纸
BK系列根据 DIN 618-1/ISO 3245 标准的滚动轴承和滑动轴承,组件
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- BK4520的同品牌近似型号
- INABK4520
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