เครื่องวัดสายตาแบบดิจิตอลรุ่นใหม่ล่าสุด พร้อมหน้าจอ LCD ขนาด 4.3 นิ้ว แบตเตอรี่ขนาดใหญ่ 3000mah รุ่น PD-400 สำหรับร้านแว่นตา

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