Safety of household and similar electrical appliances particular requirements for pedestrian - controlled mains - operated lawn scarifiers and aerators 家用和类似用途电器的安全步行控制的电动草坪松土机和松砂机的专用要求
Installations for oil supply systems for oil burners - safety requirements and tests - parts , valves , pipes , filters , oil de - aerators , meters 油燃烧器供油系统的安装.安全性要求和试验.部件阀门管道过滤器油空气分离器油量计
Installations for oil supply systems for oil burners - part 2 : safety requirements and tests ; parts , valves pipes , filters , oil de - aerators , meters ; german version en 12514 - 2 : 2000 油燃烧器供油系统的安装.第1部分:安全要求和试验.部
Knowing about the effect of environment variation in aerator on microorganism growth by detecting environment factors and observing activated sludge 通过测定曝气池中的环境因素和观察活性污泥状态,认识环境因素对微生物生长的影响。
Household and similar electrical appliances - safety - part 2 - 92 : particular requirements for pedestrian - controlled mains - operated lawn scarifiers and aerators 家用和类似电器的安全.第2 - 92部分:脚踏控制的电源线操作的草坪松土机和松砂机
For the assembly and connection of aerator composed of reducer , electromotor , cover , impeller , strut bar , and floating ball , please refer to fig . 1 增氧机的减速箱、电动机、罩壳、支撑杆、叶轮和浮球等六大部件的整机装配连接方法参见图一。
Installations for oil supply systems for oil burners - part 2 : safety requirements and tests : parts , valves , pipes , filters , oil de - aerators , meters 燃油锅炉供油系统的安装.第2部分:安全性要求和试验.零件阀门,管道过滤器油排气器和仪表
Abstract : the improvement project for aerator of zincifica tion building is discussed . at the same time , the design and calculation is carr ied through 文摘:论述了镀锌楼通风装置的改进措施,并对改进措施进行了设计计算,实际运行效果良好。
Activated sludge system , aerator , aerobic treatment system , anaerobic treatment system , blower , diffuser , rotating biological contactor , trickling filter 活性污泥系统、曝气机、耗氧处理系统、厌氧处理系统、鼓风机、渗透器、旋转式生物过滤器、滴滤池
Activated sludge system , aerator , aerobic treatment system , anaerobic treatment system , blower , diffuser , rotating biological contactor , trickling filter 活性污泥系统、曝气机、耗氧处理系统、厌氧处理系统、鼓风机、渗透器、旋转式生物过滤器、滴滤池