১২.০৪.২০২১। একাদশ:ক্লাস-৫২।উৎপাদন ব্যবস্থাপনা ও বিপণন। ১মপত্র:৬ষ্ঠ অধ্যায়। পণ্য ডিজাইন প্রক্রিয়া।

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