English ⇄ Chinese Russian +

break before make
telecom.	先断后合; 先开后合
break-before-make [ˌbreɪkbɪˌfɔː'meɪk, -ˌfɔːr'-]
gen.	先开后关; 先开后合接点; 断-合
el.	先断后合接点
mech.	先开后合
space	先断后通

break before make : 40 phrases in 13 subjects

Automobiles	1
Aviation	3
Electricity	3
Electronics	6
General	2
Geophysics	1
Metallurgy	2
Oil / petroleum	2
Power system protection	2
Space	4
Technology	10
Telecommunications	2
Television	2