精密 无内圈滚针轴承TAF253720咬口机用RNA/NK253720尺寸25*37*20

日本NSK无内圈滚针轴承NK10/15/NK12/15/NK152512/NK253720..

精密滚针轴承无内圈内套NK152312 152512 253720

滚针轴承 NK30/20 RNA253720 NK253720