With smaller laser spot size and thiner marking line, it is suitable for fine graphics and text.
光斑模式好，打标效果精细，适合一些精细图文的标记。
The spark is more stronger when the central electrode is thiner. even at a relatively low voltage ignition phenomena also occur when the power concentrate at a plot.
中心电极越细所产生的火花越强、当电量集中与一点时，即使在相对较低的电压下也会发生点火现象。
But outer pith cell of hollow center potato was bigger than that of normal one, and the cell wall was thicker. But the wall of pith cell was thiner than that of normal one.
空心块茎环髓区细胞壁厚度比健康块茎的厚，而心髓区细胞壁厚度则比健康块茎的薄；
But outer pith cell of hollow center potato was bigger than that of normal one, and the cell wall was thicker. But the wall of pith cell was thiner than that of normal one.
空心块茎环髓区细胞壁厚度比健康块茎的厚，而心髓区细胞壁厚度则比健康块茎的薄；
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