Effects of various parameters of spherical cycloid and ball diameter on the self-lock performance of the mechanism are analyzed in detail.

分析球面摆线各参数、钢球直径等对传动机构自锁性能的影响。

youdao

The present invention has advantages of well-distributed moisture within raw cement balls, even ball diameter, moderate strength and low damage percentage.

本发明的优点是：水泥生料料球水分分布均匀、粒度均齐、强度适中、破损率低。

youdao

Aerospace - airframe ball bearings, double - row, self - aligning, diameter series 2 - metric series.

航空航天。飞机结构用直径系列2的自位双列球轴承。米制系列。

youdao

But concern has been emerging for some time about certain types of metal-on-metal hips, in particular those where the ball head has a diameter of 36mm or more.

BBC: Annual checks for patients with all-metal hips

If the record is confirmed, an 18 ft diameter hollowed out golf ball will be constructed to sit atop the tee, from where golfers will be able to tee off.

CNN: February 5, 2013 -- Updated 1840 GMT (0240 HKT)

The meteor was one yard in diameter, about the size of an exercise ball, when it entered the atmosphere over eastern Pennsylvania, said Cooke.

CNN: Meteor lights up East Coast -- and social media