hold-down assembly是什么意思

用法例句

The working principle and feature of the self-locking gag based on cylinder and double wedges are introduced.

介绍了一种基于圆柱—双斜楔面增力的冲击式自锁压紧装置的工作原理和性能特点,分析了其自锁的条件,给出了输出力的计算公式。