烧杯的固有频率可以用直接测量法、共振法或水滴流调制法加以测定，各法中均利用利萨如图形。
The intrinsic frequency of a beaker can be determined by means of direct determination, resonance or water drip modulation, and each of the methods makes use of the Lissajous figure.
研究开发了多段滴流床反应气提合成双酚A的新设备与工艺，成功地解决了固定床树脂法合成工艺和设备存在的问题。
The equipment and technology of stripping reaction process with multi stage trickle bed reactor have been developed for production of BPA.
研究开发了多段滴流床反应气提合成双酚A的新设备与工艺，成功地解决了固定床树脂法合成工艺和设备存在的问题。
The equipment and technology of stripping reaction process with multi stage trickle bed reactor have been developed for production of BPA.
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