Introduces the feature of the narrow gap welding, and analyses how to determine the form of groove, 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。
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。
According to the different casing, the welding groove of all parts is classified and the form of welding groove and the welds marking number used commonly in casing are determined.
针对不同形式的机壳，进行各部位焊接坡口形式分类，确定机壳中常用的焊接坡口形式、焊缝标注代号，为设计者在焊接机壳的设计中提供了方便和依据。
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