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You should not touch the film winder before you use up all the film.
在底片用完之前，不能动卷片旋钮。
youdao
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One design method for winder of spheroidal tank was presented in this article.
介绍一种球罐盘梯的设计方法。
youdao
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One design method for winder of spheroidal tank was presented in this article.
介绍一种球罐盘梯的设计方法。
youdao