Another benefit of the tryout press is that it permits die spotting (i.e., adjusting the upper and lower dies) prior to stamping operations.

调试压机的另外一个优点就是在冲压前对模具进行定位(例如调整上模和下模)。

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The results revealed that in trees closest to the Wi-Fi source the upper and lower epidermis (skin) of the leaves developed a metallic luster and began to die off.

结果是，离无线宽带辐射源最近的小树，叶子的上下表皮出现了金属光泽，并且开始枯萎。

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The forming recesses (1, 3) of a lower die (2) and an upper die (4) are formed to have a semi-oval profile so as to provide a forming space S almost oval in section with the dies closed.

下模具（2）和上模具（4）的成型凹部（1、3）形成为具有半椭圆形 轮廓以当模具闭合时提供大体椭圆形横截面的成型空间（S）。

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