The life of an electronic fluorescent lamp is generally longer than that of an incandescent lamp, so the brightness of the final lamp will also decrease. Because of this, electronic fluorescent lamps have the initial luminous flux and average luminous flux, and the average luminous flux is the measu... More
Those who like football will pay attention to the top five football leagues in Europe, namely the top five leagues in the European football league with influence and competitive level. These leagues represent the world's top football level and attract many players to join. The vane of the developmen... More
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