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watch spring 表的發條。

watch tower

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 埃林瓦是一種用于手表彈簧的鎳鉻鋼,因其能在很大的溫度范圍內保持一定的彈性。

But someone else will make swiss watch springs from that five - dollar block of steel . do you know what that worth is 他用來做瑞士手表的彈簧,你知道它的價值嗎?

A die plate for flattening metal into strips , as in the manufacture of watch springs 扁條拉模一種用來拉平鋼條的模板,如用于生產手表發條的模板

Horology . watch spring - barrel springs . quality classes 鐘表業.手表彈簧鎖定裝置的發條.質量分類