Computer · Hardware Devices
एक इनपुट डिवाइस जिसमें एक सॉकेट द्वारा पकड़ी गई बाहर की ओर उभरी हुई गेंद होती है और गेंद के घूमने का पता लगाने के लिए सेंसर लगे होते हैं, उसे क्या कहा जाता है?
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