As the summer sun begins to beat down, concerns about ultraviolet (UV) rays also increase. UV rays are one of…
여름철 자외선에 대처하는 우리의 자세 내리쬐는 햇볕이 따가워지는 여름이 오면서 자외선에 대한 우려도 커지고 있습니다. 자외선은 피부의 탄력을 떨어뜨려 피부…
Ancient Use of Mirrors in Warfare The famous ancient Greek mathematician Archimedes reportedly used large concave mirrors during the war…
▣ Types of Lights We Use Fluorescent lamps are light bulbs that contain mercury sealed in a vacuum glass tube,…
▣ Painting Work for Indoor and Outdoor Environments Painting work involves creating a coating on the surface of construction materials…
▣ 실내외에서 진행하는 도장 작업 도장 작업은 건설 구조물 재료 표면에 방부·방청·방충·방화나 장식을 목적으로 도막을 형성시켜 내습성·내후성·내약품성을 갖게 만드는 작업이다.…
≪ Shift workers are employees who work in shifts divided into two or more groups, each working at different times.…
The "Humidifier Sanitizer Incident," where consumers who used commercially purchased humidifier sanitizers suffered deaths or critical lung diseases, and the…