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[单选题]
按《110-500kV架空送电线路施工及验收规范》的规定,杆塔组立,杆塔连接螺栓应逐个紧固,对于规格为M20,4.8级螺栓的扭紧力矩不应小()N•m。
A.90
B.100
C.120
D.140
查看答案
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A.90
B.100
C.120
D.140
A.0.001
B.0.002
C.0.003
D.0.004
A.±0.5‰
B.±0.7‰
C.±1‰
D.±2‰
A.110kV
B.220kV
C.330kV
D.500kV
A.±1.5%,±3%
B.±1.5%,±2.5%
C.±2.0%,±2.5%
D.±2.5%,±3.0%
A.60℃、80℃
B.50℃、60℃
C.80℃、60℃
D.80℃、50℃