A proton contains three charged quarks bound by the strong force and its radius is defined as the distance at which the charge density drops below a certain value.
一个质子由三个带电的夸克通过强相互作用力结合而形成，它的半径是由电荷密度降到某一确定值的距离来确定的。
Field data were analyzed. It showed that axis force increased along with pipe jacking at the very start, and it maintained stated basically when jacking to a certain distance.
实测数据分析表明，管节开始顶进时轴力随顶进距离增大而增大，顶进到一定距离后，基本维持在一定范围内。
Field data were analyzed. It showed that axis force increased along with pipe jacking at the very start, and it maintained stated basically when jacking to a certain distance.
实测数据分析表明，管节开始顶进时轴力随顶进距离增大而增大，顶进到一定距离后，基本维持在一定范围内。
应用推荐