adjustment device短语¹⁴⁴⁹⁷²⁺² 基本例句 调节装置 Button type needle distance adjustment device is suitable for production of multi types. 按扭式针码调节最适合式品种生产。 cnsewing This paper introduces a new AC voltage adjustment device controlling by optocoupler relay and gives detailed analysis of it's circuit. 对一种用光耦合继电器控制的交流调压器进行了介绍和分析，给出了该调压器的特点。 cnki