任何通有電流的導(dǎo)線,都可以在其周圍產(chǎn)生磁場的現(xiàn)象,稱為電流的磁效應(yīng)。磁現(xiàn)象與電現(xiàn)象是被分別進行研究的,特別是吉爾伯特對磁現(xiàn)象與電現(xiàn)象進行深入分析對比后斷言電與磁是兩種截然不同的現(xiàn)象,沒有什么一致性。之后,許多科學(xué)家都認為電與磁沒有什么聯(lián)系,連庫侖也曾斷言,電與磁是兩種完全不同的實體,它們不可能相互作用或轉(zhuǎn)化。但是電與磁是否有一定的聯(lián)系的疑問一直縈繞在一些有志探索的科學(xué)家的心頭 FOXBORO HHT-AAEFNB Digital Handstück Terminal Foxboro L0111UU Control Board Pcb Circuit board Rev A FOXBORO 763RSA-CE30-AM Tableau Enregistreur 115v-ac FOXBORO P0916PW Double Node Bus Module FOXBORO D0140JF-B L0113XQ-01 Panel Schnittstellenkarte Foxboro IAP10-D20C1F-M1 Absolute Pressure Transmitter 30psi 12.5-42v-dc FOXBORO IDP10-D20B21F-L1 Differenziale Pressione Trasmettitore 0-102cm-wc FOXBORO IAP10-D20C1F-M1L1 Absolue Pression Transmetteur 12.5-42v-dc Foxboro 763RSA-CE30-AM Chart Recorder 115v-ac FOXBORO P0917LP Fbm219 Tensione Monitor I/O Modulo Foxboro IDP10-A22A01F-M2 Pressure Transmitter 0-15in-h2o 11.5-42v-dc Foxboro 43AP-FA52C/PB-BA MTS IAS-AG Pneumatic Pressure Controller 0-100psi FOXBORO 43ap-fa52c/PC Pneumatico Controller 0-100psi FOXBORO Cof-120/4-2 Commutation Oscilación Retroalimentación Módulo Foxboro SM-1730 Rotary Actuator 1ph 115v-ac FOXBORO IGP10-D20C1C-K Gage Druck Sender 0-10psi 12.5-42v-dc Foxboro 43AP-FA42C/PC-15 Pneumatic Controller 3-15psi FOXBORO 66KLT-OHA Integratore 120va-c 17va 10-50ma 10pps Foxboro 2804-SABA-TSAG-G M/2800 Series Magnetic Flowtube 120v-ac 4in 150 FOXBORO FBM217 P0916CA Tensione Monitor Modulo Assemblaggio FOXBORO 760RNA-2A6T Tableau Enregistreur 24v-ac Foxboro 43AP-FA42C/TA-3B Pneumatic Temperature Controller 100-300f Foxboro B0133UD-E 接口電路板 Invensys F8051 E #172 Foxboro 97480891 1FL10-D52H11F ELECT 1423YV014-0984-FS-BASF2 發(fā)射器 #171 Foxboro 5077068 2A8520 + B0141AN 827DF-IS1SHSA1-A 電發(fā)射器 P0922YUFPS40024 - FOXBORO - P0922YUFPS400-24 / Alimentazione Foxboro IGP10-I20D0F Gage Pressure Transmitter 0-20psi 12.5-42v-dc Foxboro P0926GW I/a Series Fbm232 Ethernet Communication Module Foxboro E20S-V2FB6 Recorder 105-125v 23va Foxboro L0120LA L0117YF-A Pcb Circuit Board FOXBORO P0926GU Fbm230 I/A Séries Canal Isolé 4 Communication Module Foxboro D0137EA Memory Power Supply 120v-ac Foxboro 2ARPS-A6-B Spec 200 Power Supply 120v-ac 5a Amp 15v-dc FOXBORO IDP10-D22A21F-M1L1 Druck Sender 0-76.2cm-h2o 12.5-42v-dc Foxboro A84BXN Double Acting Cylinder 4in 15in 1 #174 Foxboro 05221020 2A0522 IDP10-DF1C01F-L1 0-280" H2O 電發(fā)射器 #175 Foxboro RTT20-DILRQFD-D2L3 溫度變送器 I/A 系列 #15 Foxboro 電源條模塊現(xiàn)場總線 P0400GH Rev C FOXBORO P0951BA FBP10 Comm Interface Prozessor Modul Foxboro 9302A-SIBA-THJ-GK Magnetic Flowtube Foxboro IAP10-D20C1F-M1 Absolute Pressure Transmitter 30psi 12.5-42v-dc Foxboro 66CT-OH-30 Summing Amplifier Module 118v-ac 12va 10-50ma FOXBORO SM-1730 Rotierende Stellmotor 1ph 115v-ac Foxboro A84BXN Double Acting Cylinder 4in 15in 1 FOXBORO D0140ZD-A D0140AE-G Kontrolle Kreislauf Platte PCB Foxboro IGP20-T22D21F-M2L1 Gage Pressure Transmitter 0-100psi 12.5-42v-dc Foxboro IDP10-DF1C01F-L1 Pressure Transmitter 0-840in-h2o 12.5-42v-dc FOXBORO FBM217 P0916PW Contact Sens Module FOXBORO D0137KU Generale Scopo Alimentazione Elettrica Modulo 120v-ac #625 Foxboro M/66B 電流中繼器 HL11-K35 66BC-0H 669-LY-114A 118V Foxboro FBM214 P0922VT 8 通信哈特輸入模塊 Foxboro 62H-4E-OJ Controller Module Foxboro D0137EA Memory Power Supply 120v-ac Foxboro L0118WF B0133SH-D Pcb Circuit Board Foxboro 130F-N4 Pneumatic Indicating Controller 20-22psi 3-15psi
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