As one intellectual instrument it is really ideal product to form a complete set with schlieren, shadower and other optical instruments. It can be used solely ast…
作为一种智能仪器，它实为纹影仪、阴影仪等其它光学仪器的理想配套产品，并可单独作为计时器或速度测量仪使用。
As one intellectual instrument it is really ideal product to form a complete set with schlieren, shadower and other optical instruments. It can be used solely ast…
作为一种智能仪器，它实为纹影仪、阴影仪等其它光学仪器的理想配套产品，并可单独作为计时器或速度测量仪使用。
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