本文用切条法测定焊接方管截面的残余应力，并对其数据进行了统计分析。
Residual - stress in welded square tube is measured by the sectioning method. And the statistical analysis of its data is made.
冷中子孔道方管采用铝合金材料焊接而成，其作用是从冷中子源引出中子。
Square tube in cold neutron channel is welded together by aluminum alloy plate, it is used to guide neutron from cold neutron source.
为改变这一现状，国家提出国内焊管行业开发集装箱用方矩形高频焊接钢管的计划。
In order to change the situation a plan to develop square H. F. welded pipe used in container has been put forward.
整体加厚方管钢结构床体，科学焊接， 整体焊接， 整体不变形，稳定性高。
The whole lathe is thickening , scientific welded, so it will not become distorted. make it more stable.
由方管直接焊接组成的结构，节点构造简单，加工方便，造价较低，在国内外已被广泛应用到各种工程领域。
The structures made of square hollow steel sections by using the directly welded joints are fabricated easily and economically, which can be found in many applications all over the world.
由方管直接焊接组成的结构，节点构造简单，加工方便，造价较低，在国内外已被广泛应用到各种工程领域。
The structures made of square hollow steel sections by using the directly welded joints are fabricated easily and economically, which can be found in many applications all over the world.
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