The oil industry is marked by an elementof danger, hence the siting of refineries is at a distance from population centers.
石油工业的特征是有一点危险性,所以炼油厂的厂址在远离人口集中的地方。
2
Having analyzed many factors, such as distance, Angle, element size, the number of gauss integral, etc., which have great effect on the gauss integral precision.
The judge methods of offset rationality is deduced at element local coordinate, and ensure that the element plane distance between after offset and before is close to the offset distance.