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[单选题]
根据JB4708—92《钢制压力容器焊接工艺评定》规定,20R钢弯曲试验的弯曲角度当焊接工艺是双面焊时应为()。
A.180°
B.100°
C.90°
D.50°
查看答案
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A.180°
B.100°
C.90°
D.50°
A.180°
B.100°
C.90°
D.50°
A.管壁厚度和板厚度均小于5mm
B.管壁厚度和板厚均小于12mm
C.管壁厚度和板厚均小于17mm
D.管壁厚度和板厚均小于20mm
A.180°
B.100°
C.90°
D.50°
A.管壁厚度和板厚度均小于5mm
B.管壁厚度和板厚度均小于12mm
C.管壁厚度和板厚度均小于17mm
D.管壁厚度和板厚度均小于20mm