On the one hand guaranteeing reducing normal stress depression, enhancing the non-dense weld ability;
一方面保证了法向应力的降低，提高非密实件的可焊性能；
2
Jewelry making industry enjoys the advantages of less energy consumption, non-pollution and dense labor force.
珠宝首饰加工业具有能耗少、无污染、劳动力密集的特点。
3
It is for this reason that we guide those living in the density of the cities to move themselves into the countryside or less dense suburbs to assure non-ascension into disease.