Galvanic current method for measuring electrodeposition velocity of immersion silver plating for printed circuit board;
一种新的印刷电路板浸银镀速的测定方法
Finishing of printed circuit board in ethylenediamine-containing immersion silver system;
印刷电路板的乙二胺络合浸镀银工艺
Integrated treatment and reuse of wastewater from printed circuit board production;
印刷电路板生产废水的综合治理及废水回用
The Recovery of EDTA in Waste PCB Chemical-copper Solution;
印刷电路板化学镀铜液回收EDTA的研究
The Strain Electrical Measurement of Automatism Incising Machine with PCB;
自动切割机切割印刷电路板应变电测量
Hardware System of PCB Flying Probe Checking up System;
印刷电路板飞针检测硬件系统
This paper recommends some methods to improve the performance of digital system when designing printed circuit board(PCB).
针对高速、高精度数字系统对电磁兼容性的严格要求,分析了系统电源、地的重要性以及影响高速模数转换器(ADC)和数模转换器(DAC)电路性能的主要因素;在设计印刷电路板时,采用隔离数字部分与模拟部分、抑制地弹噪声等方法优化系统电源,通过改善ABC、DAC电路的供电方式、优化采样时钟和高速数字信号线来提高系统抗电磁干扰的能力;并比较了一个失败案例和一个成功案例,后者较前者带外抑制指标提高约15dB,表明采用所述方法可以有效改善数字系统的电磁兼容性。
Characterization of pyrolysis of waste printed circuit boards by high-resolution pyrolysis gas chromatography-mass spectrometry;
废弃印刷电路板材料裂解产物的高分辨裂解气相色谱-质谱分析
In order to solve the problem of secondary pollution during crushing of discarded printed circuit boards(PCB),pyrolysis behavior and corresponding pyrolysis products of discarded PCB were mensurated using TG-FTIR analysis system.
为了有效解决废弃印刷电路板在破碎过程中的二次污染问题,应用热重-红外(TG-FT IR)分析系统测定了电路板热解行为以及相应的气体产物。
A new method of measurement on near field electromagnetic radiation of printed circuit boards is described with the basic principle of its operation discussed.
文中主要阐述了一种测量印刷电路板近场电磁辐射的新方法，讨论了此种方法的基本工作原理。
Employing the machine vision system of a mounter, the location error of the first printed circuit board (PCB) can be a (eliminated) firstly by teaching method, then the location error and fabrication error of the other PCB s can be eliminated by identifying the shape, calculating the coordinate of the fiducial mark and comparing with the first PCB.
利用贴片机视觉系统,首先通过示教的方法消除第1块印刷电路板(PCB)的定位误差,然后利用对PCB板基准点的图像识别与计算,消除其余PCB板的定位误差和制造误差,从而保证了贴片机的重复贴装精度。
Feeder assignment problem is one critical problem of placement machine assembling printed circuit board (PCB).
供料器分配问题是贴片机贴装印刷电路板(PCB)中的一个关键问题,它直接影响贴片机生产效率的高低。
A concept of equivalent permittivity for the planar structure of printed circuit board (PCB) was presented.
提出了用于印刷电路板 ( PCB)扁平多层介质结构的等效介电常数的概念 ,使在 PCB结构中电容提取的计算量减少到自由空间中电容提取的量级 ,并保持相当的精度 ,此外还可与目前计算电容效率最高的多极加速法兼容 。
printed circuit board
ph.1. 印刷电路板
printed circuit boards, PCBs, integrated circuitry diagrams
印刷电路板, 印刷电路板, 集成电路图
fibre-glass printed circuit board
玻璃纤维印刷电路板
A printed circuit connector contact.
印刷电路板连接器触点。
twin surface print circuit light-sensitizer
双面印刷电路板感光机
Faulty cluster printed circuit board
有故障的印刷电路板
A printed circuit board that plugs into a mother board.
插入主机板（母板）中的一种印刷电路板。
High-voltage Electrostatic Separation for Fragmentized Printed Circuit Boards;
破碎废弃印刷电路板的高压静电分选
REPLACE INSTRUMENT CLUSTER CIRCUIT BOARD (MIC).
更换仪表组印刷电路板（ＭＩＣ）。
Design of High-Speed Printed Circuit Board and the DDR2 Simulation;
高速印刷电路板的设计及DDR2仿真
Simulation and Detection of Printed Circuit Board Based on CAD;
对基于CAD的印刷电路板仿真与检测
Utilize the Protel DXP to Design and Make Exquisite Printed-Circuit-Board;
利用Protel DXP设计制作精美印刷电路板
A Study on Treatment of Wastewater from Printed Circuit Board Production
印刷电路板生产废水处理工艺的研究
PYROLYSIS CHARACTERISTIC OF WASTE PHENOLIC-RESIN-BASED PRINTED CIRCUIT BOARDS
废旧酚醛树脂印刷电路板的热解特征
Study on modal analysis of PCBA based on ABAQUS
基于ABAQUS的印刷电路板组件模态研究
high density fine pitch printed circuit board
高密度细线距印刷电路板；高密度细线距线路板
The Study of Naked Board and Sticked Parcel Components on Printed Circuit Board;
印刷电路板光板和贴片组件检测系统的研究
PCBs, wiring blueprints, electrical and electronic devices
印刷电路板, 接线设计图, 电气和电子设备