A.壁厚max-壁厚min
B.（壁厚max-壁厚min）/公称壁厚
C.外径max-外径min
D.（外径max-外径min）/公称外径

A.10%-20%
B.20%-40%
C.40%-60%
D.60%-80%

A.N32汽轮机油
B.32#外膜油
C.KN140
D.煤油

A.3个月
B.6个月
C.9个月
D.12个月

A.芯头齿顶角60°
B.齿条数60条
C.芯头长60mm
D.芯头倒角60°

A.芯头齿顶角23°
B.芯头螺旋角23°
C.生产铜管齿顶角23°
D.生产铜管螺旋角23°

A.芯头齿顶角29°
B.芯头螺旋角29°
C.生产铜管齿顶角29°
D.生产铜管螺旋角29°

A.芯头实际外径8.48mm
B.芯头名义外径8.48mm
C.管坯内径8.48mm
D.铜管外径8.48mm

A.实际外径9.52mm
B.名义外径9.52mm
C.实际内径9.52mm
D.名义内径9.52mm

A.1
B.2
C.3
D.4

A.12.7mm
B.11mm
C.9.52mm
D.7.3mm