- 填密: densification; packing
- 螺母: nut source; origin; parent
- 扳手: spanner; wrench lever
- 大螺母扳手: co truction wrench; construction wrench
- 螺母扳手: key screw; knuckle buster; nut key; nut socket driver; nut spanner; nut wrench; nutwrench
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