ball

ball and chain

球镣, 妻子

ball and ring apparatus

[机] 球环软点测定器

ball and ring method

[化] 球环法(测定树脂熔点)

ball and roller bearing

[化] 滚珠-滚柱轴承

ball and socket

n. 球窝

ball and socket joint

[化] 球窝接头

ball arm

[机] 球杆

ball bearing

[化] 滚珠轴承; 球轴承

ball bearing floating plate

[机] 球承式模

ball bearing grease

[机] 球轴承润滑脂

ball bearing steel

[化] 轴承钢

ball bearing steels

[化] 轴承钢

ball boy

n. （给打网球的人捡球的）球童

ball cage

[化] 滚珠轴承罩; 滚珠隔离圈

ball carrier

[体]持球前进的队员

ball cartridge

实弹

ball case cover

[化] 滚珠轴承压盖

ball check nozzle

[化] 球形止回喷嘴

ball check valve

[化] 球形止回阀; 球式单向阀; 球形节流阀

ball chuck

[机] 球夹