/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: knowhowalter https://cdn.slidesharecdn.com/profile-photo-knowhowalter-48x48.jpg?cb=1523098030 Know-how nanotechnologies for home appliance, for polymers, for real estate and design / green technology /. These technologies tested with good results and profit. knowhowalter.blogspot.com