reel-to-reel tape recorder
reel-to-reel tape transport
role-to- role(reel-to-reel)
FR-FR Frame Relay – to – Frame Relay
phase-rotation relay phase-sequence relay
phase-sequence relay phase-rotation relay
slow-release relay (=slow-releasing relay)
Cable Reel
缆轴
电缆卷筒
电缆滚筒
电缆盘
电缆滚动条
缆索卷筒
电缆卷盘
[电]缆卷轴
电缆滚动条台座