We are on the ground because the mass of quarks.
我们之所以在地面上是因为夸克的重量。
It can improve the strength and stability of ground, rock mass, and other structures.
通过锚杆的支护加固，岩土体的强度和稳定性能够得到显著的改善和提高。
It can improve the strength and stability of ground, rock mass, and other structures.
通过锚杆的支护加固，岩土体的强度和稳定性能够得到显著的改善和提高。
应用推荐