This design aims to build a sinusoidal wave generator based on double MCU 89S52 and the DDS,which can obtain the wide signal frequency output.
采用直接数字频率合成(DDS)芯片AD9850,设计了基于双单片机AT89S52的正弦信号源电路。
Preparation of double-deck tablets of Radix Tripterygjun wilfordii;
雷公藤双层片的制备工艺研究
Objective:To study the preparation procedure of the Radix Tripteryg ju n Wilfordii double-deck tablets,and Eudragit LⅡwas prepared as the main materi al.
目的:以丙烯酸树脂Ⅱ为主要材料,优选雷公藤双层片的制备工艺。
The authors has done some research on the application of the converse piezoelectric effect of piezoelectricity ceramic duplex cystal to the automation production conveyer line and presented a novel approach to make piezoelectricity potter duplex crystal with binary system Pb(Ni1/3Nb2/3)O_3-PbTiO_3-PbZrO_3.
通过压电陶瓷的逆压电效应对压电陶瓷双晶片在自动生产送料线上的应用研究 ,得出在二元系 Pb(Ni1/3Nb2 /3) O3- Pb Ti O3- Pb Zr O3的基础上作调整制作的压电双晶片。
This device introduces duplex crystal vibrator structure,so it is simple and easy for use and has no electromagnetic interference The resonance frequency of the oscillator is about 300Hz,when applied voltage reaches±300V.
该器件是采用压电双晶片振子结构 ,因而结构简单 ,使用方便 ,无电磁干扰。
friction clutch of double-disk dry type
干式双片摩擦离合器
Before implantation, the flexible double-disc patch is pulled into a catheter, collapsing and compressing it lengthwise.
在植入前，可弯曲的双片补片被拉入导管。
DS/DD [Double-Sided and Double Density]
双面双密度[指磁片
twin oblique photograph
双镜头倾斜航摄照片
bipolar bit slice
双极型位片微处理机
bimetal time delay relay
双金属片延时继电器
DS/HD [Double-Sided and High Density]
双面高密度[指磁片
double stator balancing capacitor
双组定片平衡电容器
tipped double circular-arc gear hob
镶片双圆弧齿轮滚刀
balance vane pump
双作用卸荷式叶片油泵
Dual-Reduction Tinplate
双相辗压镀锡薄钢片
double end circular saw flanks grinding
双头圆锯片侧磨齿机
bimetal-disk overload relay
双金属片过载继电器
bimetallic temperature transducer
双金属片温度传感器
twin eyelid
双调节片的调节喷口
SS/DD [Single-Sided Double Density]
单面／双密度[指磁片
The design of double-sheetmetal unit for disc double-sheetmetal steam trap
圆盘双金属片式蒸汽疏水阀双金属片组件的设计
Multi－gate GaAs MMIC DPDT Power Switches
多栅砷化镓单片集成双刀双掷功率开关