问题
问答题
螺纹联接常用的防松方法有哪些
答案
参考答案：螺纹联接常用的防松方法主要有利用摩擦防松、利用机械防松和永久防松三种。其中，利用摩擦防松的方法有双螺母、弹簧垫圈和自锁螺母等；利用机械防松的方法有开口销与槽形螺母、止动垫片、圆螺母用带翅垫片和串联钢丝等；永久防松的方法有端铆、冲点和粘合等。
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螺纹联接常用的防松方法有哪些
参考答案：螺纹联接常用的防松方法主要有利用摩擦防松、利用机械防松和永久防松三种。其中，利用摩擦防松的方法有双螺母、弹簧垫圈和自锁螺母等；利用机械防松的方法有开口销与槽形螺母、止动垫片、圆螺母用带翅垫片和串联钢丝等；永久防松的方法有端铆、冲点和粘合等。
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| Mr. and __1__ Wang want to buy a __2__ for their daughter. They come into a shop and have __3__ look. There are many different skirts in it. They see a price tag (标签) on one blue skirt. It __4__ "$ 100". They like the __5__ but it is too __6__. Mr. Wang doesn't think they can __7__ it now. They leave the shop and go to another __8__ . __9__ another shop, they buy a __10__ one for their daughter. | |||
| ( ) 1. A. Mrs. ( ) 2. A. coat ( ) 3. A. a ( ) 4. A. says ( ) 5. A. red ( ) 6. A. cheap ( ) 7. A. see ( ) 8. A. one ( ) 9. A. After ( ) 0. A. dearer | B. Miss B. clothes B. an B. writes B. price B. dear B. sell B. shirt B. Of B. cheaper | C. Mr. C. shoes C. the C. said C. color C. small C. buy C. school C. In C. red | D. Uncle D. skirt D. / D. writing D. shop D. big D. find D. coat D. Behind D. big |