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[单选题]
根据JG/T203-2007标准,使用曲率半径R=60mm的CSK-ⅠCj型试块来调节灵敏度可直接用于检测直径最大为()的圆管对接焊缝。
A.120mm
B.144mm
C.160mm
D.180mm
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A.120mm
B.144mm
C.160mm
D.180mm
A.100mm/s10%
B.120mm/s10%
C.150mm/s10%
D.150mm/s15%
A.RBJ-1试块
B.RB试块
C.CSK-ⅠCj试块
D.CSK-ⅠDj试块
A.一次,50%
B.二次,50%
C.一次,80%
D.二次,80%
A.RBJ-1试块
B.RB试块
C.CSK-ⅠCj试块
D.CSK-ⅠDj试块