A.1Ω B.2Ω C.3Ω D.4Ω
A.0.01s B.0.015s C.0.02s D.0.025s
A.0.05MPa~0.5MPa B.0.05MPa~0.6MPa C.0.05MPa~1.0MPa D.0.05MPa~1.2MPa