โควิด -19, การทดสอบ Covid-19, การระบาดกระจายทั่ว, ไวรัสโคโรน่า, ใกล้ชิด, วัตถุหนึ่งชิ้น, ไฟฟ้า, อุปกรณ์, ปุ่มกด, แมโคร, เทคโนโลยี
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