描述
在PLC的编程语言中，梯形图是最为广泛使用的语言，通过PLC的指令系统将梯形图变成PLC能接受程序，由编程器键入到PLC用户存储区去。而梯形图与继电器控制原理图十分相似，主要原因是PLC梯形图的发明大致上沿用户继电器控制电路的元件符号
ASML 4022.470.01974 Agilent 2801 E1849A Card Board HP
HP AGILENT 54520C 500 MHz OSCILLOSCOPE
AGILENT HP 85046B S-PARAMETER TEST SET WITH OPT C03
HP Agilent 85046A opt H19 S-Parameter / Mixer Test Set
Agilent/HP 6625A Precision Dual-Output Power Supply
Agilent/HP 6623A 25-105W DC System Power Supplies
HP Agilent 7673 B Complete Autosampler HPIB – Warranty
HP/Agilent 5350B Microwave Frequency Counter
Agilent / HP 8672A 2-18Ghz Synth. Signal Generator
TESTED AND 30 DAY WARRANTY
Agilent HP 8657A Signal Generator – IN STOCK
Expedited shipping available
HP Agilent 8444A-OPT 059 Tracking Generator .5-1500 MHz
One-day shipping available
