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| 1. | Turn thread tension screw 2 toward A to increase the bobbin thread tension, or toward B to decrease it |
| 向A的方向转动线张力螺丝2之后，底线张力变强，向B的方向转动之后，底线张力则变弱。 |
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| 2. | Adjusting the bobbin thread tensio |
| 底线张力的调节 |
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| 3. | a machine stitch in which the top thread interlocks with the bobbin thread. |
| 上面的线与底线相连的一种缝纫机缝纫方法。 |
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| 4. | Increase the bobbin thread tension. |
| 请调强底线张力。 |
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| 5. | Decrease the bobbin thread tension. |
| 请调弱底线张力。 |
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| 6. | The thread has not been passed through the notch of the bobbin case tension spring. |
| 底线不能进入到梭壳的线张力弹簧下面。 |
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| 7. | Threading the bobbin case |
| 底线的穿线方法 |
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| 8. | The bobbin thread tension is too high. |
| 底线张力过强。 |
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| 9. | The bobbin thread tension is too low. |
| 底线张力过弱。 |
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| 10. | Remove machine basting by snipping the top thread at frequent intervals and pulling out the bobbin thread |
| 拆除机制粗缝的方法：先抽出底线,后剪断间隔处的面线即可。 |
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