钩锁锁面磨修后须恢复原型,13号钩锁锁面厚度恢复至()mm。
A.76±1
B.80±1
C.82±1
参考答案:A
—Will you please go to see the movie Guanyinshan with me?
—No, I won’t. I ______ already.
A. saw B. have seen C. see D. will see
道岔各种螺栓、连杆、顶铁和间隔铁损坏、变形或作用不良时必须立即进行修理或更换。