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ring-and-ball apparatus | |||
ring and ball test | |||
ball and ring method | |||
ring and ball method | |||
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ball-and-ring method |
环球 法: 23 phrases in 12 subjects |
Architecture | 1 |
Baseball | 1 |
Chemistry | 2 |
Electronics | 1 |
General | 1 |
Metallurgy | 3 |
Oil / petroleum | 2 |
Plastics | 3 |
Polymers | 2 |
Technology | 5 |
Textile industry | 1 |
United Nations | 1 |