828D子程序库说明:SINUMERIK 828D 是新一代强大的紧凑型数控系统。必须使? PLC Programming Tool（V3.2）来进行机床电?逻辑的设计。(828D subroutine library descr iption: SINUMERIK 828D is a new generation of powerful compact CNC system. We must make PLC (V3.2) Programming Tool to design the elec