driving star驱动: drive; prime mover星: star摆动星轮: lowering sprocket传动星轮摩擦簧: driving star friction spring日历指示器传动星轮: indicator driving star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:驱动星轮，即可在微信中查询翻译
