Three states can be set : one compressor on , the other compressor on or two compressors on . when two compressors are running synchronously , the system will ensure that the two compressors dont start up at the same time , but the one starts up first , and the other start up after 1 minute 可以设定只开1机只开2机或两台压机同时工作，当两台压机同时工作时，系统确保两台压机不同时启动，而是先启动一台，过1分钟再启动另一台。
It shows that the adjacent synthetic jet flow field is affected by the phase - difference , amplitude and frequency of two actuators , and the synthetic jet is asymmetric and turning when they are working differently . the main reasons result with the asymmetry and the interaction between the two adjacent synthetic jets , leading to the formation of " low pressure closed circumfluence region " , which is also called entrainment field , and the synthetic jet turns to the region where the pressure is lower and the vorticity magnitude is higher 当两相邻激励器处于不同工作状态同时工作时，合成射流将发生偏转，其主要机理是由于两激励器吸入和排出流体流动不同，使得两列旋涡对不对称，在两列旋涡对之间存在“卷吸场”和压强梯度，从而引起旋涡对向低压侧和强涡量区偏转。
A “ fixed installation ” may be a combination of several pieces of equipment , systems , products and / or components ( or parts ) assembled and / or erected by a professional assembler or installer at a given place to operate together in an expected environment and to perform a specific task , but not intended to be placed on the market as a single functional or commercial unit 固定机组是几件设备、系统、产品和或组件的组合，这些分组件由专业组装者或安装者在特定位置建立起来、在预期环境同时工作完成特定功能，但在市场上不是作为单一功用或商用组件。
The design process of the multi - beamforming is presented detailedly , which include the orthogonal demodulation and resample technology , the schema of phase shift beamforming , and the effect of the frequency shift and the phase disturbance . the secondary filter is designed to eliminate the influence of the close frequency 讨论了频偏和相位扰动对波束的影响；双频或三频同时工作时，为消除相邻频率间的干扰，设计了二次滤波的特殊处理方法，仿真表明设计满足要求。
A auto - focusing compensation machine is studied with double - deck guideway and double - deck cam , the double - deck machine ' s synchronous operation is able to compensate the deviation of focus , and ensure the opticus being fixed on the ccd ' s receiv ing surface during photography 研制出一种双层导轨、双层凸轮的自动调焦补偿机构，两层机构同时工作能够正确的补偿光机系统因环境条件变化和照相距离变化导致的离焦量，使相机在照相过程中始终保持光学焦面稳定在ccd接收面上。
Under special conditions such as low partial load / deep vacuum , unexpected high air leakage resulting in a major temperature difference ( above 10 c ) between the steam exhaust turbine temperature and all air - take off temperature measurement , the suction capacity can be improved by using 2 main ejector simultaneously 在特殊条件如局部低载荷/极端真空，不正常的热交换，意想不到的高空气泄漏导致的在蒸汽排气温度和抽空温度测量上产生的严重温差（ 10 c以上） ，用两台主抽汽器同时工作可以提高抽气量。
It adopts computer digital controlled system plc orientation mo dule touch scerrn to control , realizing x z w axis direction s precise orientation by ac servo system . in actual operation , just put the glass on the transmission belt , input drilling position data on the screen , press the start button , the machine will automatically position itself and finish all drilling operations , and automatically stop when the works is completed . this machine s two group drilling heads can work at the same time , one group drilling head is also ok . this machine has high drilling efficiency and accurate position , is an ideal choiceness equiment of scree - wall glass and other large specand volume production glass drilling 该机采用计算机数控系统plc定位模块触摸显示屏控制，由交流伺服系统实现x z w轴三个方向的精确定位。操作时只需将玻璃放在传送带上，在显示屏上输入钻孔位置，按启动按钮，自动定位钻削所有孔位，完成工作后自动停机。本机两组钻孔机头可以同时工作，也可以单组机头工作。
