Xi'an Yongxing Science and Technology Development Co.,Ltd was founded in 2001.It is an comprehensive enterprise group incorporating R&D,manufacturing,processing(OEM),international trade and service an a whole,being widely applied in the industries of petroleum,petrifaction,electric power,environmental project,clean energy,etc. Its RICHFRP oil well logging business division is a professional company which specially develops high tenpeture pressure-bearing composite insulation products for ...