???¦Ë?????? >????PLC????

????????????PLC????
??????????????????????????
???PLC????????????FBS??????FB??????FBA??????FBN??????FBE?????PLC?????
??????PLC FBS????
??????FBS PLC????...
????PLC FBS????
??????FBS PLC????...
- ?? 1?2?????
??????????????????????????
???PLC????????????FBS??????FB??????FBA??????FBN??????FBE?????PLC?????
??????FBS PLC????...
??????FBS PLC????...