气动机构主要有哪几种结构形式？ 气动执行机构又称气动头又称气动执行器（英文：Pneumatic actuator）执行器按百其能源形式分成气动，电动和液动三大类，它们各有特点，限于于有所不同的场合。气动执度行器是执行器中的一种类别。气动执行器还可以分成单起到和双起到两种类型：执行器的电源动作都通过气源来知驱动继续执行，叫作DOUBLE ACTING（双起到）。SPRINGRETURN（单起到）执行器只有道开或者关是气源驱动，忽略的动作则由弹簧内废黜。常见的气动执行机构有气动薄膜式、气动活塞式（气缸式）、气动长行程机构和侧装式气动薄膜机容构（又叫增力型气动薄膜机构）。希望可以帮到你，记得点赞！谢谢！
麻烦翻译这句话，谢谢“气动式即开即热太阳能热水器控制装置” Pneumatic Controller for Instant Solar Water Heaters
英语翻译 Portable pneumatic ventilator in acute emergency hospital transport of critically ill patients applicationAbstract：Objective To investigate the portable pneumatic emergency ventilator in critically ill patients in acute hospital transfer of application.Methods 285 cases of acute and critically ill patients using a portable pneumatic emergency ventilator for mechanical ventilation，observe the ventilation effect.Results of 280 cases in a stable condition during transport，refers to the oxygen saturation remained at 95 to 100%，no complications；five cases of cardiopulmonary arrest on admission than 30 minutes，died after a positive.Conclusion portable emergency ventilator pneumatic critically ill patients in acute hospital transfer is feasible，it is widely used.Key words：acute and critically ill patients；portable emergency ventilator；hospital transport.
