單項(xiàng)選擇題
A.30 B.60 C.90 D.120
A.1/2 B.1/3 C.1/4 D.1/5
A.40mm B.60mm C.80mm D.100mm
A.±0.1% B.±0.5% C.±1% D.±2%
A.2~2.0 B.2.2-3.0 C.2.6~3.4 D.3.0~3.8
A.5B.10C.15D.20
A.1 B.2 C.3 D.4
A.2 B.3 C.4 D.5
A.0.1~0.2Mpa B.0.2~0.4Mpa C.0.5~0.6MPa D.0.7~0.9MPa