penetration ratio是什么意思

网络释义

用法例句

The paper introduces how to extinguishing fire of throughout shafts by the comprehensive direct fire-fighting methods.

介绍采用"综合直接灭火法"处理穿层井筒自然火灾的方法、灭火实例及灭火效果。

The paper introduces how to extinguishing fire of throughout shafts by the comprehensive direct fire-fighting methods.

介绍采用"综合直接灭火法"处理穿层井筒自然火灾的方法、火实例及灭火效果。

Outburst Comprehensive Prevention Technology for Mine Shaft Sinkin Through Dangerous Seam with Potential Outburst

井筒揭穿突出危险煤层综合防突技术

Vertical Shaft Aquifer Surface Advance Grouting Engineering Technique

立井井筒含水层地面预注浆施工技术

Monitoring data analysis of soil grouting reinforcement in vertical shaft

立井井筒地层注浆加固实测数据分析

Slippery Mold Construct of Internal Shaft Lining in Freezing Shaft on Large Sectio Thick Surface Soil

大断面深厚表土层冻结井筒内层井壁滑模施工

Research on Coupling Theory of Horizontal Borehole and Coalbed Methane Reservoir

水平井筒与煤层气藏耦合的理论研究

The Construction Program of Exposing Deep Seam of in Main Shaft Coal of HU Jia-River Mine

胡家河煤矿主井井筒揭露深厚煤层施工方案

New Ideas and Construction Practice Concerning Air Shaft Material in the Compressible Layer

立井井筒可缩层选材的新思路与施工实践

Deep Alluvium Mine Shaft Drilling Construction Method

深厚冲积层煤矿井筒钻井法施工的探讨

The Simple Discussion on the Safe Construction of Deep Thick Swelling Clay Layer of Vertical Shaft

浅谈立井井筒深厚冻结膨胀粘土层的安全施工

The Grouting Technology for Water Plugging in Bedrock Faultage of the Vertical Shaft

浅谈立井井筒基岩段断层带堵水注浆技术

Construction Practice on Rapid Driving through Silt Layer in Large-bore Vertical Shaft

大断面立井井筒快速通过砂土层的施工实践

The Construction Technology of the Frozen Air Shaft with Huge-Thick Soil and Major Diameter

巨厚表土层大直径立井井筒冻结法施工技术

Shaft Slippery Mold Construction of Frosen Liner at Big Section with Deep Thick Surface Soil

大断面深厚表土层冻结立井井筒内层井壁滑模施工

Technology and Practices on Deep Mine Shaft Sinking Through Multi Outburst Seam

深立井揭穿多层突出煤层技术与实践

Simple Analysis on Geological Characteristics and Construction Methods of Pit Shaft of Cretaceous Strata

浅析白垩纪地层地质特性及井筒施工方法

Application of Grouting Technology in Shaf Crossing Aquifer

注浆封水技术在井筒过含水层时的应用

The Study of Developing Mechanism and Harnessing Technology for Shaft Fracturing in Thick Alluvium

厚冲积层立井井筒破坏的发生机理及防治技术研究