common-channel signalling\nCCS\n通信
【物理】发信号装置，看得见的
signalling arrangement, visible
暂无补充释义。
相关词条
closed circuit signalling【通信】
out-of-band signalling【通信】
leak-signalling fluid
alternating-current signaling【电】;AC signalling【通信】
SIGNALLING devices for household letter-boxes or deposit
disk signalling
personal signalling, pocket bell