短语词组短語bucket t brigade device 組桶式掐;鬭鏈式掐BBD Bucket Brigade Device 消防桶長龍接力式器件;戽鏈器件;組桶式器件D Bucket brigade device 戽鏈器件BBD D Bucket Brigade Device 消防桶長龍接力式器件;戽鏈器件 返回 bucket brigade device