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Sound waves traveling through the air are collected through the auricle or pinna, which directs them into the external auditory canal. These two structures comprise the outer ear. The sound waves ...
Normal body temperatures vary depending on many factors, including a person’s age and activity levels.The average adult body temperature is around 98.6°F (37°C). However, people’s baseline body ...
Máy Nhiệt Kế Đo Trán Hồng Ngoại Điện Tử Infrared Thermometer - BẢO HÀNH CHÍNH HÃNG Đã bán: 182/530 ...