/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: mario69 https://cdn.slidesharecdn.com/profile-photo-mario69-48x48.jpg?cb=1632126194 I'm a thinker, develop many ideas, eagerly to write a book, and focus to study Occupational Quality-Health-Safety-Environment