Removed Pin From Net: NetName=ECHO Pin=P2-2
Removed Pin From Net: NetName=ECHO2 Pin=P5-2
Added Component: Designator=P6(4P)
Added Pin To Net: NetName=GND Pin=P6-1
Added Pin To Net: NetName=TRIG Pin=P6-3
Added Pin To Net: NetName=VCC Pin=P6-4
Added Pin To Net: NetName=ECH2 Pin=P2-2
Added Net: Name=ECH2
Added Pin To Net: NetName=ECH3 Pin=P6-2
Added Net: Name=ECH3
Added Pin To Net: NetName=ECHO1 Pin=P5-2
Added Net: Name=ECHO1
Added Member To Class: ClassName=51Ƭϵͳ Member=Component P6 Header 4
Added Room: Name=51Ƭϵͳ
