highway-rail double decked main bridge
shortened rail；standard shortened rail；fabricated short rail used on curves；standard curtailed rail
hydraulic main water main
main pole and main zero
main road main scheme station
ring main structure of main and auxiliary lines
hand rail [= open rail]
heavy rail for high speed rail way
High Manganese Steel Rail And Guard Rail
rail-to-rail
满电源
轨对轨
全摆幅
轨到轨
轨至轨
轨－至－轨
轨道-轨道
满幅
满摆幅
rail-to-rail amplifier transconductance