短語詞組短語annular green space 環(huán)狀綠型annular sealed space 環(huán)形密閉空間annular r space 環(huán)形空間annular seal space [機]密封腔annular finned space radiator 環(huán)形片式空間散熱器annular -space centrifugal extractor 環(huán)隙式離心萃取機wellbore of small -annular-space 小間隙井眼Annular space protection 阻火保護材ccentric annular space 偏心環(huán)空 返回 annular space