backup equipment

基本解释

Arrange to have back-up equipment close by and be prepared to present without visuals;
准备一些备用设备以防万一，并做好没有图像资料仍能演讲的准备；
Back-up equipment and proper training will allow the photographer to produce acceptable results.
后备设备和适当的训练，将允许摄影师产生可以接受的结果。
gdpccsi.blog.163.com
Furtherly, the paper also takes the back-up equipment, concept and application for the downhole-deploymemt-valve into full research.
此外，本文还对套管阀的设备配套、理论和应用进行了较全面的分析研究。
lib.swpu.edu.cn

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The full-size USB port provides connectivity to existing equipment and SD card reader enables easy file transfer plus back-up when Internet access is not feasible.
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