双向制动器 bi-directional brake

双向制约 external supervision

双向制冷 BI-LEV

物质的双向制约 material biconditional

双方向复制 bidirectional replication

委托代理双向制衡机制 The Principal-agent Bidirectional Balance Mechanism

双向限制器 slicer

双向公差制 bilateral system of limits ; bilateral tolerance system ; bilateral system of tolerance

双向选择制度 two-way choice system

双向复制 bi-directional replication ; [遗] bidirectional replication