2. Function : To avoid the screw to loose, it could be used with nut. 功能：作用在防止螺丝松动，可搭配螺帽做固定工件用。
3. To clean or replace parts; shut off supply, loosen lock-nut and back off adjusting screw. 如果要清洗或更换部件，关闭供应管道，松开锁紧螺母，退出调节螺丝。
英英解释
n.
1. usually large hard-shelled seed
2. Egyptian goddess of the sky
3. a small (usually square or hexagonal) metal block with internal screw thread to be fitted onto a bol
4. half the width of an em
5. a whimsically eccentric person
6. someone who is so ardently devoted to something that it resembles an addiction
7. one of the two male reproductive glands that produce spermatozoa and secrete androgens v.
1. gather nuts
