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tension dial /ˈtɛneɪl/ n

中文：张力刻度盘

中文 · 张力刻度盘Español · regulador de tamaño de puntoFrançais · bouton de tension
Meaning：Button that adjusts the tension based on the type of thread.
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Found in these illustrated scenes（2）

Knitting machine tension device Sewing machine

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