imaginary circular point
point point protocol terminated aggregation
point-point communication
point-point comparison method
point-point extreme distance
switch point；point tongue；switch rail；tongue rail；blade
3-point and 5-point difference schemes
accumulation point or limit point
blind point and difficult point of prescription
burning point fire point
burning point：fire point
communication in point to point mode
communication in point-to-point
difference compare method point-by-point
direct point-by-point inscription method