telephone switchboard 
交换台,
交换机 switchboard operator 接线
用户正在搜索
guanophore,
guanopterin,
guanoside,
guanosine,
guanoxabenz,
guanoxane,
guanoxyfen,
Guanta,
guanware,
guanxi,
相似单词
switchable,
switch-and-fuse,
switchback,
switch-back,
switchblade,
switchboard,
switchboard operator,
switchbox,
switch-box,
switch-desk,