spiral connection

The normal calculation formulas of the strength of the well pipe and the endured connection FRP threads of the spiral line's length are given.

最后推导出管道本体和受力连接螺纹强度设计、螺纹螺旋线总长等通用计算公式。

During the Spiral welded pipe production, the main reasons of manual bend caused in strip steel are unusual aline of strip steel in strip steel connection weld process.

在螺旋焊管生产过程中，钢带产生人为硬弯的主要原因是对头焊工序中钢带不能对齐所致。

Taking Suzhou International Expo Centre as an example, presents the connection technique, hanger form and installation strategy of the double spiral duct in large space buildings.

以苏州国际博览中心为例，介绍了大空间建筑双层螺旋风管的连接工艺、吊架形式和吊装方法。

Putting some different sizes spiral coil element of the same name connection, as the current flows in a direction consistent, so the magnetic field generated has the same direction and the new inductance greater than the single-layer coil inductance.

将多个尺寸的螺旋形线圈元的同名端相接时，由于电流流入的方向一致，产生的磁场的方向相同，且电感量远远大于单层线圈的电感量。

Quality control of high-strength big six-angle spiral connection

高强度大六角头螺栓连接的质量控制

Application of High Pressure Spiral Jet Pile on the Connection Permeability Resistance of Continuous Concrete Wall& QC group overcome the difficult problems in the construction

高压旋喷桩在地下连续墙接头抗渗中的应用&QC小组攻克施工难题