词汇	reciprocatiny theorem
释义	reciprocatiny theorem 互易定理
随便看	telegraph cable telegraph cable beacon telegraph cable buoy telegraph-cable buoy telegraph cable landing buoy Telegraph cable paper for punchig telegraph calling set telegraph call processing telegraph carrier telegraph carrier terminal telegraph center telegraph central office telegraph chain telegraph-chain telegraph channel telegraph channel frame telegraph channel transmission equipment telegraph charge telegraph checkable code telegraph checkable code comparing unit telegraph chute telegraph cipher machine telegraph circuit telegraph circuit leasing service telegraph circuit phantom