1R12X16X16 ]尺寸参数,1R12X16X16 日本NTN丝杆支撑轴承 4T-02820,1R12X16X16型号尺寸，1R12X16X16轴承价格,1R12X16X16采购 1R12X16X16采购价格,1R12X16X16尺寸参数