"HXD3型电力机车牵引齿轮螺旋角为(C)(A)4° (B)6° (C)8° (D)9°
2023-12-01总031
"HXD3型电力机车牵引齿轮螺旋角为(C)(A)4° (B)6° (C)8° (D)9°
A.4°
B.6°
C.8°
D.9°"
正确答案是C

"HXD3型电力机车牵引齿轮螺旋角为(C)(A)4° (B)6° (C)8° (D)9°
A.4°
B.6°
C.8°
D.9°"
正确答案是C