. "a hollow metal conductor that provides a path to guide microwaves; used in radar"@en-us . . "04564413-n"^^ . . "a hollow metal conductor that provides a path to guide microwaves; used in radar"@en-us . . "waveguide"@en-us . . "waveguide"^^ . "103600178"@en-us . . . "0"^^ . . . "104386922"@en-us . "0"^^ . "wave guide"@en-us . "104564413"^^ . .