1.
Application of π type steel girder in broken easy caving roof
π型钢梁在破碎易冒落顶板中的应用
2.
Application of π-shaped steel beam of longwall mining technology with big dip
大倾角π型钢梁长壁采煤工艺的应用
3.
π Steel Beam to replace Movable Support in the Non-stop Production
π型钢梁替换悬移支架在非停产中的应用
4.
Application of BDY Sliding Support in Provement of π Type Steel Caving Technology
BDY滑移支架在π型钢放顶煤工艺改革中的应用
5.
Probe into Improving Recovery Ratio of Caving Coal at π Steel Beam Caving Coal Face by Deep Hole Pre-Fracture Blasting
深孔预裂爆破提高π型钢梁放顶煤回采率可行探讨
6.
π Inflammable Thick Seam Steel Caving Face Note Fire-fighting Techniques of Nitrogen
易自燃厚煤层π型钢放顶煤工作面注氮防灭火技术初探
7.
Technical Issues of Mining for Coal with"π"Model Girder Roof Coal;
“π”型钢梁放顶煤开采中的若干技术问题分析
8.
DOUBLE-WEB VIERENDEEL TRUSSES AND THE ULTIMATE LOAD BEARING CAPACITY OF SQUARE HOLLOW SECTION π-JOINTS
双竖腹杆空腹桁架与方钢管连接π型节点的极限承载力
9.
Intramolecular Electron Transfer and Its Dependence on the External Electric Field in π-σ-π Type of Bistable Molecule;
π-σ-π型双稳态分子中的分子内电子转移及其外电场效应
10.
Research on Static Tensile Test of Typical T-Shape and π-Shape Joints
典型T型和π型接头的拉伸静力试验研究
11.
The Deduction of a Special Case of the Exchange of Resistance Equivalents of Both Π-Shape and T-Shape Connections;
电阻Π型与T型联接等效互换的特例法推导
12.
Novel π-type Conducted Common-mode EMI Model for Induction Machines
感应电机传导干扰频段Π型共模等效模型
13.
The Ship Longitudinal Fore and Aft Direction Multivariate Stochastic Control Methods Study on the Basis of π Rudder;
基于π型舵船舶纵向多变量随机控制方法研究
14.
Theory Study on Second-order Nonlinear Optical Properties of Some Organic Molecules with D-π-A Structure;
一些D-π-A型有机分子二阶NLO性质的理论研究
15.
Imaging Analysis of Pion Sources in Smoothed Particle Hydrodynamic Model
对光滑粒子流体动力学模型π源的视像分析
16.
Stainless Steel/Steel Dome Head
不锈钢/钢 圆头型
17.
Stainless Steel/Steel Countersunk
不锈钢/钢 沉头型
18.
Stainless Steel/Steel Standard
不锈钢/钢 标准型