PK34X42X19.8X2 日本NTN恩梯恩印刷机轴承 8Q-NK34X50X35-7PX1,PK34X42X19.8X2货期价格,PK34X42X19.8X2图纸参数,PK34X42X19.8X2采购交期 4T-1985型号尺寸，4T-1985轴承价格,4T-1985采购,