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Т形三通
el.	T-bend
Y 形三通
refrig.	fork shaped tee
L 形三通
compr.	L-pattern three way
γ形三通
el.	Y-branch

形三通: 24 phrases in 11 subjects

Architecture	1
Electronics	4
General	1
Hydroelectric power stations	3
Metallurgy	1
Nautical	1
Oil / petroleum	1
Plastics	2
Refrigeration	2
Shipbuilding	1
Technology	7