金属密封球阀 抽样方案
| 批 量 数 | 抽样台数 | |
| DN≤150 | DN≥200 | |
| ≤20 | ≤10 | 1 |
| >20~60 | >10~40 | 2 |
| >60~100 a | >40~80 b | 3 |
a 批量超过100台,则分为两批次,以此类推。 b 批量超过80台,则分为两批次,以此类推。 |
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