roll synchronizer滚: roll; turn round; trundle转: revolve; rotate; turn; swive ...同步: synchronization; synchronism ...器: implement; utensil; ware滚转同步接收机: roll control transformer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:滚转同步器，即可在微信中查询翻译
