闭门器

I introduced in the paper one kind of VVVF elevator control system, I has used the closed loop velocity modulation regarding the elevator velocity modulation system, and has carried on the detailed design separately to the hardware electric circuit main part,including PLC control section,frequency changer,main circuit and gate and so on.

在论文中我介绍了一种VVVF的电梯控制系统，对于电梯的调速系统我采用了闭环调速，并对硬件电路的主要部分分别进行了详细设计，包括PLC控制部分，变频器，主电路和门电路等。

The main products: water treatment equipment Series: cast iron gates and copper inlay hoist, stainless steel gates, steel gates, steel shoot glass doors, glass doors influx of steel; series grille decontamination; series centres around transmission scraping mud-and-Xini , Concentrated; sludge dewatering belt with dehydration; various mixers, and drug equipment, pipeline mixer; iron and steel, petrochemical, mining water supply, water circulation system and special equipment; various filters, biological materials aeration Vehicles.

主要产品：水处理设备系列：铸铁镶铜闸门及启闭机，不锈钢闸门，钢制闸门，玻璃钢拍门，玻璃钢潮门；系列格栅除污机；系列中心周边传动刮泥机，吸泥机，浓缩机；污泥脱水用带式脱水机；各类搅拌机，加药设备，管道混合器；钢铁、石化、矿山企业给水、循环水系统专用设备；各类过滤器、生物填料、曝气器等。

The control apparatus main body detects the position of the elevator doors based on the signal from the mark reader and controls the on/off of the elevator doors.

控制装置主体根据来自标记读取器的信号检测电梯门的位置，并控制电梯门的开闭动作。

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On a second installation portion movable relative to the first installation portion owing to the on/off of the elevator doors, a mark reader is installed to detect the wireless marking apparatus.

在通过电梯门的开闭动作而相对于第1安装部相对移动的第2安装部上，安装有检测无线标记装置的标记读取器。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。