放开手脚办展走出国门参展张勃中国发明协会成立以来，为了号召和鼓舞人民群众投身于发明创造活动中来，启迪科技人员和发明爱好者的创造性思维，促进发明成果的开发与应用，下大力气主办和参加了近４０次国内和国际发明展览会。事买证明，主办和参加国内、国际展览会．都... Open hands and feet to do the exhibition out of the country exhibitors Zhang Bo China Invention Association since its establishment, in order to call and encourage people to join in the invention and creation activities, enlightening the creative thinking of science and technology personnel and inventors, to promote the development and application of inventions, Great efforts to host and participated in nearly 40 domestic and international exhibitions of inventions. Buy proof, host and participate in domestic and international exhibitions. All...