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Waermeschutzfilter n | |||
Wärmeschutzfilter n | |||
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 | 2 |