Jolly balance

名词 n.
中文释义

英文释义

名词 n.
  1. An instrument for determining specific gravity by comparing how much an object stretches a spring when held in a pan hanging in the air to how much that same object stretches a spring when held in a pan underwater.

词形变化

Jolly balances plural

词源

Invented by the German physicist Philipp von Jolly in 1864.
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