Description
梯形图程序中流过的“电流”也并非真实的物理电流，而是“能流”，它只能按“从左到右”、“从上到下”的规则流动。“能流”不允许倒流。“能流”到达则对应线圈得电接通。其实“能流”只是用户程序运算中满足输出执行条件时的形象表示方式而已。
Credence LT1101 Voltage Supply Board 671-4014-04 Spare
TE-W Thermal Infrared Camera 160*120 core protype
Lot of 2973pcs NEC UPD78F0102HMC-5A4 F0102H 8-bit $1/pc
Welch Allyn 88042A Colposcope Factory Refurbished Spare
Refurbished ALSTOM STF-DL ANTENNA Ref: 23509 Rev. E
