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| 1. | There came the presence of a large number of minute air bubbles resulting from incomplete impregnation |
| 由于树脂不能完全渗入到纤维中，因而造成了大量微小的气泡。 |
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| 2. | There came the presence of a large number of minute air bubbles resulting from incomplete impregnation |
| 由于树脂不能完全渗入到纤维中，因而造成了大量微小的气泡。 |
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