torsion balance
柯林斯词典
1. N an instrument used to measure small forces, esp electric or magnetic forces, by the torsion they produce in a thin wire, thread, or rod 扭秤(用于测量微力，尤指电力或磁力)
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1. N an instrument used to measure small forces, esp electric or magnetic forces, by the torsion they produce in a thin wire, thread, or rod 扭秤(用于测量微力，尤指电力或磁力)