ball joint roof bar是什么意思

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用法例句

The reforming basic structure of HDJA-1000 metal hinge top beam is introduced.

介绍了HDJA-1000型金属铰接顶梁的改造基本结构,阐述了改造后在采煤工作面应用的多种功能,及其经济性、可靠性和安全性。

Based on S1-5 up-seam of Changcun mining workface is isolated island face,behavior of rockstrate is clear, cross-section of roadway weaken and reduct and roadway floor heave, through comparing with science, metal intersection hinge roof cooperate hydraulic prop in driving roadway, lead safeguards and manages roof, it gains good result.

针对常村煤矿S_(1-5)上分层综采工作面是一“孤岛”采面,矿压显现明显、回采巷道断面收敛回缩以及巷道严重底鼓的状况,经科学比较,采用金属十字铰接顶梁配合单体柱在回采巷道中进行超前维护管理顶板,收到了显著效果。

Seismic inelastic displacement amplification factor for beam-hinge mechanism RC frame;

梁铰型屈服RC框架结构地震弹塑性位移增大系数研究

Analysis of the Linked Fissure Destruct Reason of Road and Bridge and the Preventable Measure;

公路桥梁铰缝破坏原因浅析与预防措施

Influence of Support Means of Hinge-Bearing for Container Crane's Boom on Lateral Vibration

岸桥前大梁铰支座支承对其横向振动的影响

Study on achieving the beam hinge mechanism based on the design of escape protection

结合逃生保障设计实现梁铰机制的探讨

Research on Comparison of Low-Pylon Calbe-Stayed Bridges with Pier-Girder Rigid Connection and Hinged Connection;

墩梁刚结和墩梁铰结矮塔斜拉桥的比较分析研究

hinged-hinged beam

两端铰支梁(端距不变

The Reliability Analysis for 20000kN Static Presser s Hinge Sleeve System;

20000kN静压机铰链梁系统的可靠性分析

Study on Defction of Transverse Joints of Simply-Supported Hollow Slab Girder Bridges

空心板简支梁桥横向铰接缝病害分析

On matrix analysis of articulated beam in Bridge Project and program calculation

桥梁工程铰接梁法的矩阵分析与程序计算

Design Method of the Headed Stud Embedded at the Pinned Joint of Steel Beam to Concrete Wall

钢梁-混凝土墙铰接节点栓钉预埋件的设计计算

The ultimate load of plate girders was analyzed by spline finite strip and plastic hinge method.

用样条有限条塑性铰法分析了板梁的极限荷载。

The Stability Performance of RC. Curved Girder Bridge Supported by Single-Column;

独柱单点铰支承砼曲线梁桥的稳定性能研究

Dynamic Assessment About Existing Simply-supported Hinge Joint Celluar Slab Bridges

既有简支铰接空心板梁桥结构状况动力评估

Accident Analysis and Reconstruction of Monorail Hanging Beam System of Three Hinged Arch Roof Truss

三铰拱屋架单轨吊梁体系事故分析及改造

Applied study on method of calculation of transverse load distribution for articulated slab girder bridges

铰接板梁桥荷载横向分布计算方法应用研究

Test on damage assessment of hinged concrete T-beam bridge system

混凝土铰接T梁桥结构体系损伤评价试验

Study on Seismic Behavior of Beam-column Joint with Beam-end Steel Fiber Concrete Plastic Hinge;

梁端钢纤维混凝土塑性铰梁柱节点抗震性能研究

What a man needs in gardening be a cast-iron back, with a hinge in it.

做园艺工作的人，得要有铸铁制的脊梁，再加上一道铰链。

Analysis of partially restrained moment at bolted connection joint of steel beam to concrete wall

钢梁-混凝土墙铰结连接节点嵌固弯矩的分析与计算