/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: koichiromatsumoto75 https://cdn.slidesharecdn.com/profile-photo-koichiromatsumoto75-48x48.jpg?cb=1635519321 I'm university student in nagano,japan majoring in mechanical systems engineering. im not good at speaking in English, but Please feel free to talk with me! and let's be friends!