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户外，CompactDAQ机箱外壳—NI-9925是用于cDAQ-9181和cDAQ-9191 CompactDAQ机箱的外壳。这种玻璃纤维外壳的最低入口保护（IP）等级为54，可为户外或工业环境提供保护。NI-9925是密封的，以防止灰尘颗粒和喷水（如雨水）。