HV. Screw and washer assemblies with plain washers.
NF E25-150-1998 带平垫圈的螺钉和垫圈组件。
The support and the chair foot connection, with the 6*20MM grub screw, puts the plain cushion and the spring pad, twists with the spanner the cap nut, covers the plastic hat.
4支撑和椅脚连接，用6*20MM的无头螺丝，放上平垫和弹簧垫，用扳手把螺帽拧上，盖上塑料帽。
Stop-discs (plain discs with central countersunk bole for a screw) are also available in two diameters, namely 18 mm (0.7 in) and 28 mm (I.1 in) respectively.
挡碟（具有螺钉中心沉孔的平面碟）也有两种直径，相应为18mm(0.7in)和28mm(1.1in)。
Besides, this paper elaborates the data processing method which is based upon the least square method and the neural network. In the embedded-based test system, it takes a research on precision test software like mono-pulse, numerical control diagonal, numerical control roundness, numerical control arbitrary plain curve and numerical control screw thread, and it also takes a research on the software of the dynamic and static display of numerical control track.
同时本文在对数控系统运行精度测试方面，阐述了基于最小二乘法和神经网络的数据处理方法，在基于嵌入式的测试系统中，实现了单脉冲检测、数控斜线、数控圆、数控任意平面曲线等精度测试软件的研究以及对数控系统的动静态性能的研究及显示的研究，并同时将测试数据结果显示在远程计算机上，满足现代测试领域中对远程测控技术的要求。
Connects with the chairback when with the 6*25MM grub screw, puts the plain cushion and the spring pad, twists with the spanner the cap nut, covers the plastic hat.
与椅背连接时用6*25MM的无头螺丝，放上平垫和弹簧垫，用扳手把螺帽拧上，盖上塑料帽。
The chair foot and the chair seat connection, with the 8*28MM grub screw, put the plain cushion and the spring pad, twists with the spanner the cap nut, covers the plastic hat.
3椅脚和椅面连接，用8*28MM的无头螺丝，放上平垫和弹簧垫，用扳手把螺帽拧上，盖上塑料帽。
Arm rest and chairback connection, with chair seat connection when with the 6*20MM grub screw, with the 8*28MM grub screw, puts the plain cushion and the spring pad, twists with the spanner the cap nut, covers the plastic hat.
2扶手和椅背连接，与椅面连接时用6*20MM的无头螺丝，用8*28MM的无头螺丝，放上平垫和弹簧垫，用扳手把螺帽拧上，盖上塑料帽。
Application of Plain Screw Connection for Expended End of Rebar in Pile Foundation
镦粗直螺纹钢筋接头在桩基中应用
Master cylinder outlet fitting gasket " Cross recessed pan head screw, single coil spring lock washer and plain washer assemblies "
主缸出油接头垫密片“GB/T9074.4-1988十字槽盘头螺钉，弹簧垫圈和平垫圈组合件”
All kinds of screw cap, plain cushion, machine screw nail, fiberboard nail and hex wood bolt.
各种螺帽、平垫、弹垫、机螺钉、自攻钉系列、纤维板钉、六角木螺钉等配套。
Specialized in manufacturing GB screws, pan head screws, lock tool screws, furniture screw, hex socket screws, nuts, carriage bolts, special bolts, pins, plain head hex socket screws, rivets, sphere screws, truss head screws, set screws, various bolts and non-standard screws.
专业生产各类国标螺丝；盘头螺丝；锁具配套螺丝；家具配套螺丝；内六角螺丝；螺母；马车螺栓；异形件螺栓；销；平头内六角螺丝；对扣螺丝；铆钉；球面螺丝；大扁头螺丝；各种非标；各种螺栓；紧定螺丝
Study of Enterance Point of Pedicle Screw through Plain Radiography
从X线片上设计椎弓根螺钉入钉点的探讨
Master cylinder outlet fitting gasket " Cross recessed pan head screw, single coil spring lock washer and plain washer assemblies "
主缸出油接头垫密片“GB/T9074.4-1988十字槽盘头螺钉，弹簧垫圈和平垫圈组合件”