研究了手表主夹板传动孔系位置度误差计算的图解法 ─ ─诺莫图模型与应用.
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午时的餐馆熙熙攘攘,一些商人在吃饭,时不时地瞟一眼腕上的手表.
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Self-winding mechanical wristwatches made their appearance during the 1920 s.
到了1920年代,能够自动上发条的机械手表就上市了.
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The boy said that, future certainly all will buy all wristwatches for you.
男孩说, 将来一定把所有的手表都买给你.
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