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Trong giới kỹ thuật thi công cáp quang xảy ra tình huống Máy đo OTDR hiển thị một xung phản xạ cực lớn báo hiệu điểm đứt hoặc lỗi nghiêm trọng, nhưng khi kiểm tra thực tế tại vị trí đó, sợi cáp vẫn nguyên vẹn, thậm chí vị trí lỗi còn... nằm ngoài chiều dài thực của tuyến cáp.___
Can cable cutters with chipped blades be sharpened? A guide to proper home repair, identifying the extent of damage, and knowing when to replace them
Dear Customers, Partners, and Employees of EMIN Vietnam, we would like to announce the holiday schedule for Hung Kings' Commemoration Day, Liberation of Southern Vietnam Day (April 30th), and International Labor Day (May 1st) in 2026.
In the modern world, noise pollution has become a growing concern. To avoid distracting background sounds, white noise is considered an effective solution for improving sleep and concentration.
In environmental noise reports or technical specifications of household appliances, we often encounter the figure 50dB. But in reality, does a 50dB noise level cause discomfort or affect health?
