आंकड़ों, लघुचित्र, क्यूआर कोड, बार कोड, कोड, कर्मी, प्रौद्योगिकी, उद्योग, स्कैनिंग, स्कैन, संचार
Public Domain
प्रासंगिक तस्वीरें
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