弹簧式减速器[缓行器] retarder spring: 阻滞弹簧loaded spring: 载荷簧spring loaded: 春季加载的; 弹簧加压的; 受载弹簧spring type retarder: 弹簧式缓行器automatic spring loaded valve: 自动弹簧阀下载手机词典可随时随地查词查翻译