self-aligning coupler

• 自动调整车钩

self-aligning coupler的用法和样例：

例句

1. The conditions and contents of the new inspection,maintenance and operation code for coupler draft gears in the Russian Federal Railway are described.
   介绍俄罗斯联邦铁路采用新的车钩缓冲装置的检修和运用规程的情况及规程的内容。