往复的

It is mainly made up of frame, gate board, screw pole, nut etc. Rotate the handwheel by hand, then the screw pole drives the nutgate board move in horizontal tofro to open or close the valve.

主要由框架、闸板、丝杆、螺母等零件构成，用手转动手轮使丝杆带着丝杆螺母和闸板沿水平方向往复运动，达到闸门的启闭目的。

It is mainly made up of frame, gate board, screw pole, nut etc.Rotate the handwheel by hand, then the screw pole drives the nutand gate board move in horizontal to and fro to open or close thevalve.

主要由框架、闸板、丝杆、螺母等零件构成，用手转动手轮使丝杆带着丝杆螺母和闸板沿水平方向往复运动，达到闸门的启闭目的。

It is mainly made up of frame, gate board, screw pole, nut etc. Rotate the handwheel by hand, then the screw pole drives the nut a nd gate board move in horizontal to a nd fro to open or close the valve.

主要由框架、闸板、丝杆、螺母等零件构成，用手转动手轮使丝杆带着丝杆螺母和闸板沿水平方向往复运动，达到闸门的启闭目的。

It is mainly made up of frame, gate board, screw pole, nut etc. Rotate the handwheel by hand, then the screw pole drives the nutgate board move in horizontal tofro to openclose the valve.

主要由框架、闸板、丝杆、螺母等零件构成，用手转动手轮使丝杆带着丝杆螺母和闸板沿水平方向往复运动，达到闸门的启闭目的。

The paper is mainly focused on the friction process between piston ring andcylinder when piston moving back and forth with cylinder.

本文主要研究内燃机活塞环-缸套摩擦副作往复运动时的摩擦过程特性。

Diamond saw blade, abrasive disc, T.C.T. circular saw blade, jig saw blade, reciprocating saw blade, hand hack saw blade, drill bit, hole saw, router bit, rotary carbide burr and power tools accessories.

上海恒辉工具有限公司 Shanghai Starcraft Tools Company Limited 2C42(W2C42)金刚石锯片，树脂砂轮片，硬质合金锯片，曲线锯，往复锯，各类手工锯条，各类钻头，各种材料的孔锯，木工铣刀，硬质合金旋转锉，电动工具附件组套等。

The FRP tube has a very slippery surface, with roughness rate only 0.009, which is considered as perfect slippery Tube for hydraulic. In daily usage, the wall of the tube of steel, iron or concrete are often corrosive and become rough, while the cross-winding tube can keep a clean and slippery wall surface.

玻璃钢管道内表面相当光滑，一般表面粗糙率可达0.009，几乎可以认为是&水力学光滑管&，在实际运行中，钢管、铸铁管、水泥管等的内表面，经常发生局部腐蚀，变得越来越粗糙，而往复交叉缠绕玻璃钢管道始终保持着新生管表面光滑状态。

Shanghai Automotive Co., Ltd-giant is located in Shanghai Minhang Economic Development Zone specialized in the manufacture and sale of Qibaoshebei, Lung Mun water knife reciprocating washing machine equipment company.

上海辉巨汽车用品有限公司是坐落于上海闵行经济开发园区一家专业制造销售汽保设备，龙门水刀往复洗车机设备的企业。

Shanghai Hui-mechanical hardware factory is located in Shanghai Minhang Economic Development Zone specialized in the manufacture and sale of Qibaoshebei, Lung Mun water knife reciprocating washing machine equipment company.

上海仁飞机械五金厂是坐落于上海闵行经济开发园区一家专业制造销售汽保设备，龙门水刀往复洗车机设备的企业。

The main product comprises silp-valve vacuum pumps, root vacuum waterring vacuum pumps, series roary vance vacuum pumps and various kinds of vacuum pumps system,Our products are widely used in areas,covering metallurgy, chemical industry,medical and pharmaceutical appliction, light and textile industry, electrical industry, defence scientifice researches etc,.

我厂主要产品有：滑阀真空泵、罗茨真空泵、往复真空泵、水环真空泵、旋涡泵各类真空机组、及真空应用设备，与供氧设备，其也通用设备制造、加工、修理。真空浸渍我厂产品广泛应用于冶金、化工、医药、经纺、电子、国防、科研等部门。特别H-8B型泵，在原有基础上经过改进，获得了更高的真空度和使用寿命。

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。