echelon formation

Five types of fracture assemblage were summarized from the siltstone of the Tertiary Shahejie Formation in the southern North China basin, i. e., ( 1) conjugated shear fracture belts arranged in en echelon N-S-striking tension fracture;

以南华北盆地户部寨第三系沙河阶组粉砂岩低渗透储层为例，总结了其中发育的5种类型构造裂缝组合，即：①南北向雁形张节理组成的共轭剪节理带；

Oil field strengthened the talent's education and reserve, perfected talent echelon formation to develop a mechanism.

油田加强了人才的培养和储备, 完善了人才梯队培养机制.

And 4 big characteristic act as agent, just about courageously the another echelon formation of assault.

而四大特色代理, 正是奋勇冲锋的又一梯队.

The calves of dolphins swim alongside their mothers in an arrangement known as echelon formation.

刚出生的海豚以一种梯队的阵型游在他们母亲的身边.