PK30X42X19.8X1 日本NTN印刷机轴承 4T-15112/15250,PK30X42X19.8X1型号尺寸，PK30X42X19.8X1轴承价格,PK30X42X19.8X1采购 4T-19283X货期价格,4T-19283X图纸参数,4T-19283X采购交期,