Introduces the feature of the narrow gap welding, and analyses how to determine the formofgroove, screen out submerged-arc welding flux and choose welding condition in detail.
介绍了窄间隙焊的特点，对坡口形式的确定、埋弧焊剂的筛选、焊接工艺参数的选择进行了详细分析。
2
Each time we use a facial muscle, a groove forms beneath the surface of the skin, which is why we see lines form with each facial expression.
每当你使用面部肌肉的时候，皮肤下就会形成一道凹槽，这就是你作表情的时候，脸部出现线条的原因。
3
According to the different casing, the welding grooveof all parts is classified and the formof welding groove and the welds marking number used commonly in casing are determined.