Table 2.
Gas parameters and levels.
| Level 1 | Level 2 | Level 3 | |
|---|---|---|---|
| Gas pressure (MPa) | 5 | 7 | 9 |
| Gas packing time (s) | 10 | 20 | 30 |
| Gas delay time (s) | 0 | 1 | 2 |
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