单词 | normal-incidence pyrheliometer |
释义 | normal-incidence pyrheliometer [`nȯr·mǝl ¦in·sǝd·ǝns ¦pīr´hē·lē`äm·ǝd·ǝr] ENGINEERING An instrument that measures the energy in the solar beam; it usually measures the radiation that strikes a target at the end of a tube equipped with a shutter and baffles to collimate the beam. |
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