Yuyao Yuzhong Optical Instrument Co., Ltd. is a high-tech enterprise integrating R & D, production.
PER Refractories is a technology-based refractory enterprise integrating R&D, production, sales, and technical services.
Refractory bricks are aluminosilicate fire refractory bricks with an AL2O3 content of 30% or more. Firebrick is a
