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Trennschicht f
biol.	abscission layer
chem.	stripping compound
construct.	underlay
meas.inst.	barrier layer
microel.	isolating layer; parting layer
mining.	parting; separation layer
phys.	separating film
soil.	streak
tech.	barrier layer; separating coating; separating layer; separator

Trennschicht: 2 phrases in 2 subjects

Construction	1
Materials science	1