名词 spring balance:

1. a balance that measure weight by the tension on a helical spring

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1. A portable torsion balance is used for weighing.
   用一台轻便的弹簧秤称重。
2. That is, the reading of the spring scale has been increased by an amount equal to the buoyant force.
   这时弹簧秤称得的数值增加到和浮力相等的量。