螺纹联接在拧紧时有哪些阻力矩?
参考答案:
螺纹联接在拧紧过程中受到预紧力,此外受到螺纹牙处的摩擦转矩和螺纹支承面上的摩擦转矩。
The teacher came in _______ a book under his arm. [ ]
A. by
B. with
C. for
D. carry
0,()
A.12
B.13
C.
D.