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delta-delta connection
el.	△-△接线
el.mach.	三角形-三角形接线
met.	三角-三角接线法
railw.	三角一三角形接法; 三角一三角形接线
tech.	双三角形接线法; 三角—三角形接法

delta-delta connection: 79 phrases in 19 subjects

Agriculture	1
Architecture	1
Automobiles	2
Aviation	2
Chemistry	1
Earth sciences	1
Electric machinery	13
Electrical engineering	1
Electronics	13
General	1
Hydroelectric power stations	4
Metallurgy	6
Oil / petroleum	2
Rail transport	10
Refrigeration	1
Space	1
Technology	15
Telecommunications	3
Wind Energy	1