Tubular vanadium oxide can be synthesized by adjusting the PH of reaction system, regulating the ratio of reactants and controlling the reaction temperature.
通过合理的调节反应物配比、调节体系的PH值、选择合适的反应温度，可以得到具有管状结构的钒酸盐晶体。
Pressure controller is composed of measuring system, controlling device, adjusting machine, neon light displaying, indicating device, crust and jack plug.
控制器由测量系统，控制装置，调整机构、氖灯显示，指示装置以及外壳和插头座等组成。
This system has the advantage of controlling and adjusting the output frequencies.
该系统具有程控调节输出频率等突出优点。
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