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heat-absorbing filter
earth.sc., industr., construct.	Waermeschutzfilter n
microsc.	Wärmeschutzfilter n
opt.	Wärmefilter n (placed in front of a lamp to protect condenser systems, interference filters etc.); Wärmeschutzfilter n (placed in front of a lamp to protect condenser systems, interference filters etc.)

heat -absorbing filter: 2 phrases in 1 subject

Optics branch of physics

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