telescopic boom伸缩: stretch out and draw back; e ...式: type; style转臂: tumbler伸缩式转向柱: telescoping steering column可伸缩式转向管柱: telescopic steering column下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:伸缩式转臂，即可在微信中查询翻译
