Before steam admission , valve on vacuum hogging extraction line （ the valve is befor hogging pipe of the two stage steam jet ejector ） should be closed ( see also two stages steam jet ejector installation and operation instruction ) 在蒸汽进入之前，抽真空启动管道上的阀门(启动抽汽器前的阀门)应该关闭（请参见相应的两级射汽抽气器安装使用说明书） 。
Based on the new technique of vacuum deep wellpoint developed in recent 10 years and the actual conditions in the well water exclusion of foundation pits , a new method for evaluation volume of water was brought forward 摘要针对近十年发展起来的井管内抽真空的深井井点新工艺，根据它在四周有良好隔水的基坑中降水的实际情况，提出了一种水量估算和井点设计的新方法。
Second1y , this thesis a1so contrasts and conc1udes on a11 kinds of methods designing vapor ejecting pump , and points out that vege1iner method is a simple but practica1 method on designing vapor ejecting pump vacuum system 其次，本文还对蒸汽喷射泵的各种设计方法做了对比归纳和总结，指出维杰利尔方法是设计烟草回潮用蒸汽喷射泵抽真空系统简单但又非常实用的方法。
Our corporation locate at tianjin , near beijing - tianjin - tanggu expressway . " quality first , customer super " is our object . solid technical force , complete quality system and perfect service after sell is guarantee of excellent quality equipment 所生产的“ unicase系列密封箱式多用炉”和“ speria bbh预抽真空多用炉”被中国热处理行业协会评定为热处理先进可靠设备，推荐企业优先选用。
The influence of various factors , including lowest pressure of the vacuum chamber , water content and size of the sample in three states of solid , lidquid or syrup , on cooling rate and on final sample temperature in self - freezing by vacuum pumping , was studied 摘要以液态、浆态和固态三种不同类型的物料为对象，通过大量实验研究了真空室压力、物料含水量和尺寸对抽真空自冻结的降温速率和对冻结最终温度的影响规律。
Mushy pvc ( dop + additives ) - beater ( stir well ) - vacuuming ( materiel has been completely dewatered and debubbled after vacuuming ) or mix with color paste which has been processed by ball mill and then dropped into mould cavity by needle cylinder ) - solidified in the constant temperature box ( color fixing ) - input basic material - sent to the constant temperature box in the flowing way and then forming and then forming and sent out automatically - cooled by fan - finished products 糊状pvc （增塑剂dop +助剂- - -打浆机搅拌均匀- - -抽真空处理） （真空机处理后的物料已完全脱离水分和气泡）或球磨机处理后的色浆混合后用针筒滴入模具形腔- - -放入恒温箱中固化（色彩定形） - - -注入底料- - -流水式送入恒温机，定型后自动送出- - -风扇冷却- - -成品
Tianjin fengdong heat treatment equipment co . , ltd , sino - japanese joint venture , is a specialist firm to produce unicase series multi - purpose complete set , speria series pre - vacuum multi - purpose furnace complete set , uninite gas soft - nitriding furnace complete set , mesh - belt type continuous furnace , pit type bright annealing furnace and pit gas carbonitriding furnace complete set 全套技术，生产滴注式unicase系列密封箱式多用炉成套设备， speria bbh型预抽真空多用炉成套设备，气体软氮化炉成套设备，网带式连续炉，井式光亮退火炉及井式气体渗碳炉成套设备，并承接各种非标热处理设备的设计和制造。
The mechanics of vacuum preloading was discussed by contrast of vacuum preloading and heaped preloading . the factors affecting the result of vacuum preloading for ground consolidation were as follows : the geological conditions of site , the intensity of vacuum pumping , the condition of underground water and installation of vertical drainage line . through analysis of these factors , some conceptions and design principles were proposed for vacuum preloading 在此基础上，通过堆载预压与真空预压的对比阐述了真空预压加固地基机理，分析了影响真空预压加固地基最终加固效果的各个因素：场地地质条件、抽真空作用强度、地下水赋存情况及竖向排水体的设置等。
