The technology of developing quality and strong pick is found by researching the hard metal alloy, pick-body material, weldgap, technique of braze welding and heat treatment.
通过对硬质合金、截齿体材质、焊缝间隙、钎焊及热处理工艺的研究，寻找出了研制优质强力截齿的技术途径。
2
An advanced double wires narrow gap SAW technique, equipment and special procedure have been used to weld high pressure storage tanks successfully with high quality welding joints.
采用先进的双丝窄间隙埋弧焊设备和专用焊接工艺，成功地焊接了大厚壁高压蓄势器，质量检查全部合格。
3
The gap control device to ensure the weld seam welding space meet the requirements, diameter, misalignment and weldgap have been strictly controlled.