Electrical couplings promote the passage of certain signals but prevent the passage of others, such as an alternatingcurrentcoupling that excludes direct current.
电子耦合器(联接器)能够使某些信号通过而阻止另一些信号通过，如阻止直流电流通过的交流耦合器。
2
Uses alternatingcurrentcoupling sensor to Intelligent monitor the dust pellet of the source of pollution.
采用交流耦合方式传感的污染源粉尘颗粒浓度的智能监测。
3
The controller case includes stepping motor, self-coupling voltage regulator, alternating-current contactor, relay and micro-transformer.