[机] 缓冲弹簧 buffer spring: 缓冲弹簧; 缓冲故障; 缓冲器弹簧spring buffer: 弹簧缓冲器; 弹簧绶冲器buffer return spring: 缓冲器复位弹簧buffer ring spring: 缓冲弹簧buffer spring case: 缓冲弹簧箱下载手机词典可随时随地查词查翻译