/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: hermawan2 https://cdn.slidesharecdn.com/profile-photo-hermawan2-48x48.jpg?cb=1656764805 Guru kimia SMK Panca Bhakti. Berkeinginan mengembangkan ilmu kimia dg berbasis internet dan mobile