| 单词 | pre-tensioner |
| 释义 | pre-tension /prē-tenˈshən/transitive verbTo stretch (the reinforcing wires or rods in pre-stressed concrete) before the concrete is cast ORIGIN: pre- (1) pre-tenˈsioned adjective pre-tenˈsioner noun (also without hyphen) a device (usu used in conjunction with the traditional locking system) that causes a seat belt to tighten in the event of a sudden forward movement by the wearer |
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