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hot line ['hɔtlaɪn]
busin.	两国首脑直接通话热线
commun.	作用〔工作〕线
dat.proc.	热线; 紧急通讯线
econ.	热线电话
el.	直通线路; 热线［紧急电信联络线］
telecom.	热线两点间直通线路; 带电线路
"hot line"
busin.	"热线"

hot line: 83 phrases in 17 subjects

Architecture	3
Automobiles	2
Aviation	2
Chemistry	1
China	1
Construction	2
Earth sciences	1
Economy	1
Electronics	5
Metallurgy	31
Navigation	1
Oil / petroleum	4
Refrigeration	3
Steel production	2
Technology	14
Telecommunications	9
United Nations	1