ප්රසන්න බද්දෙවිතන මෙහෙයවන සිරස A3 උසස් පෙළ රසායන විද්යා වීඩියෝ සදහා යොමුවන්න.
https://studentlanka.com/2013/07/09/al-chemistry-video-lessons-by-prasanna-baddewithana-sirasa-a3-tv/
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