The technology of developing quality and strong pick is found by researching the hard metal alloy, pick-body material, weld gap, 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。
Weld, braze, cement, solder and thread joints to join pipes and fabricate sections of piping system.
焊接，钎焊，用水泥涂抹，焊锡和螺纹接头，使其连接至管道，从而制造管道系统截面。
Weld, braze, cement, solder and thread joints to join pipes and fabricate sections of piping system.
焊接，钎焊，用水泥涂抹，焊锡和螺纹接头，使其连接至管道，从而制造管道系统截面。
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