网络次级;又称分段
例句:
Study of determination method on water infusion parameters of water Pre-infusion treating top coal in fully mechanized sub-level caving mining
综放开采预注水处理顶煤的注水参数确定方法研究
Mechanical deformation analysis of floor strata of roadway driving along next goaf in fully mechanized sub-level caving face
综放沿空掘巷底鼓的受力变形分析
The Application of Inner Interlocked Tail Road in 2308 Comprehensively Mining Sub-level Work Face at Si He Coal Mine
内错尾巷在寺河矿2308综采放顶煤工作面的应用