The only problem was, nobody at the station had an arm small enough to actually reach in through the two-and-a-half inch opening and pack grease around the bearing.

可是执行这个办法的最后的一个困难在于站里没有一个人的手臂小到可以伸进这个只有2.5英寸的开孔，他们无法把油脂涂抹到轴承的四周。

youdao

The critical velocity of the Karo syrup would be 100 miles per hour for a quarter-inch ball bearing.

滚珠的临界速度，是每小时100英里，低得多。

youdao

The sub plate was then supported at one end by a vertical 10-inch diameter rotary table and at the opposite end by an outboard bearing support.

附属盘子然后支持在一末端在一条垂直的10英寸的直径以前旋转的桌子和在由外置轴承支持引起的相反的结局。

youdao

It's only slightly taller, too, at 130mm (5.13 inches) vs. 115mm (4.5 inches) but, thankfully, it's far thinner: 9.3mm (0.37 inch) vs. the 11mm (0.43 inch) of its QWERTY-bearing predecessor.

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The only problem was, nobody at the station had an arm small enough to actually reach in through the two-and-a-half inch opening and pack grease around the bearing.

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