Jolly balance

短语

[化] 约利比重秤

词形变化

Jolly balances 复数 Jolly balances

释义与例句

n.
  1. 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.

词源

Invented by the German physicist Philipp von Jolly in 1864.

来源：wiktionary