The welding quality of field-welded girth joints of long-distance oil and gas transmission pipelines is the key to the quality and service life of pipelines.
油气长输管线现场环焊缝接头的焊接质量是决定管线质量、寿命的最根本要素。
2
Its welded black metal screens visually delimit the space and maintain the full depth of field of the entire volume.
其黑色金属焊接的屏幕视觉上划定了空间，维护整个体块区域的景深。
3
Using experimental mechanical method of moire analysis, strain field distributions of LY12CZ aluminum alloy welded joints under different conditions were investigated.