free sampling
| method
| free sampling abbr. | |
| tech. | 任意抽样 |
| method abbr. | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
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| 任意抽样 | |||
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free sampling : 4 phrases in 2 subjects |
| Business | 1 |
| Technology | 3 |