KBK19X23.8X24.8X 日本NTN恩梯恩带座轴承 NUKR80H/3AS,KBK19X23.8X24.8X重量,KBK19X23.8X24.8X尺寸,KBK19X23.8X24.8X参数 NUP309ET2XC3U重量,NUP309ET2XC3U尺寸,NUP309ET2XC3U参数,