| 释义 |
safety chain
noun
1.
a. : a normally slack chain for preventing excessive movement between a railroad car truck and a car body in sluing
b. : a heavy chain by which railroad cars may be connected to protect against accidental uncoupling
2. : a small chain used as a secondary safeguard on a piece of jewelry (as a watch or bracelet)
3. : a chain formed of sheet metal links with an elongated hole through each broad end and constructed by a repeated series of doubling a link upon itself, slipping the next link through the two now superimposed holes of the first, and doubling it |