गियर, घड़ी, प्रक्रिया, प्रक्रिया का इष्टतीमीकरण, अनुकूलन, कार्यप्रवाह, प्रदर्शन, व्यापार, हस्तांतरण, काम, समारोह
Public Domain
प्रासंगिक तस्वीरें
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