Elinvar is a trademark for a kind of nickel-chromium steel used for watch springs because its elasticity is constant over a wide range of temperatures.
埃林瓦是
种用于手表弹簧
钢，因其能在很
温度范围内
定弹性。
恒弹性钢Elinvar is a trademark for a kind of nickel-chromium steel used for watch springs because its elasticity is constant over a wide range of temperatures.
埃林瓦是种用于手表弹簧钢，因其能在很温度范围内定弹性。
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