斜栔夹紧机构。结构简单,夹紧行程小,增力比小,按自锁条件选择斜角A=(),常用于动力装置的增力。
参考答案:6~8°
—I'm thinking of the test tomorrow; I'm afraid I can't pass this time.
—________! I'm sure you'll make it.[ ]
A. Go ahead
B. Good luck
C. No problem
D. Cheer up
通讯者特征