更新时间：2024-05-13 13:34:07
Noun:- a pen that has a small metal ball as the point of transfer of ink to paper
- ball faced hexagonal nut
- ball-milling synthesis
- ball-joint manipulator
- ball shoveling technique
- ball-bearing cap screw
- Ballenger's septum gouge
- ball
- ball and disc integrator
- Ballan
- ball end milling cutters
- ball bearing steel strip
- Ballenger's tonsil knife
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