• 阐明了发育初期、中期后期三个发育阶段头溯源侵蚀沟壁扩展和下切侵蚀变化规律。

    The change of ephemeral gully headward erosion, gully-wall collapsing and deep-cutting erosion were quantified in the three stages of initial-phase, metaphase and anaphase.

    youdao

  • 叫做支撑东西——一种用于挡住金属箱体——挖土超过英尺约1.5米,用它防止塌方

    There's something called a trench box - a metal case that holds back the sides of the walls - to be used to stop them caving in when you dig deeper than 5ft.

    youdao

  • 叫做东西——一种用来阻止两面往下坍塌金属容器——挖土超过5英尺(约1.52米)深时,它来防止沟壁坍塌。

    There's something called a trench box-a metal case that holds back the sides of the walls-used to stop the walls from 5 caving in when you dig deeper than 5ft.

    youdao

  • 哈拉煤矿2 - 2煤层开采系统介绍了神东矿区连续采煤机械化开采的巷道系统及其相关参数

    Taking 2-2 coal seam of Halagou coal mine for example, laneway system and its interrelated parameters with short-wall and continuous mining machine in Shendong mining area were introduced.

    youdao

  • 结果显示扣带外侧识别中央标志,若出现间回则更易识别中央

    The results showed that marginal ramus of cingulate sulcus and posterior ascending ramus of lateral sulcus are the landmarks for recognition of central sulcus.

    youdao

  • 目的研究正常人下裂眶下横断面CT表现及其解剖基础,避免将其误认为骨折。

    Objective To show imaging findings of inferior orbital fissure(IOF)and groove(IOG)on axial CT scans and to discover their anatomic variations, so as to avoid misdiagnosing them as orbital fracture.

    youdao

  • 神华集团神东矿区哈拉煤矿工作面回风巷中采用了一种新型自移超前支护支架

    A new type self-walking advance timbering support set is adopted in longwall coal mining face of Halagou coal Mine, Shendong coal District by Shenhua Group co.

    youdao

  • 神华集团神东矿区哈拉煤矿工作面回风巷中采用了一种新型自移超前支护支架

    A new type self-walking advance timbering support set is adopted in longwall coal mining face of Halagou coal Mine, Shendong coal District by Shenhua Group co.

    youdao

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