双r型柱：r型柱状图的平均值，用于统计过程控制。
R-DOUBLE BAR: the average of the R-Bars, used in statistical process control.
以Q345钢结构箱型柱为对象，研究了超声冲击工艺对焊接残余应力的影响。
The effects of ultrasonic impact treatment (UIT) on the residual stresses of welded rectangular steel (Q345) pillar were investigated.
箱型柱制作质量是箱型柱质量的关键，介绍了箱型柱制作的关键工序——隔板的加工组装工艺。
This paper presents the key working procedure of box column making — technique for processing and assembling of the clapboard.
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