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.
埃林瓦是一种用于手表弹簧的镍铬,能在很的温度保持一定的弹性。
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.
埃林瓦是一种用于手表弹簧的镍铬,能在很的温度保持一定的弹性。
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