Shandong Yongyan Sealant Industry Co.,Ltd
Shandong Yongyan sealant industry co.,ltd is a professional enqaqed in the organic silicon series products research, development, production and sales enter-prises. Shandong Yongyan Sealant Industry Co.,Ltd has been engaqed in organic silicon products research and development of senior engineers and organic silicon senior professionals, Shandong Yongyan sealant industry co.,ltd has a strong technical innovation ability, won a government progress prize of scientific and technoloaical achievements.
