grg

GRG是一个计算机代数程序，它为解决在微分几何，地心引力场论题。

GRG is a computer algebra program designed for the problems in the differential geometry, gravitation and field theory.

In 1999 our factory established and began the manufacture of fiber glass reinforced plastics product、GRC 、GRG、polyurethane product and all kinds of material European style abnormity product.

我厂自1999年建厂以来，生产玻璃钢产、GRC外墙装饰、石膏制、聚胺脂装饰制种材质欧式异行产。