大胃王与王囡囡
proportions of welded joints have been standardized. preferred sizes, dimensions ,and charts 焊缝的比例已经标准化。用于计算焊缝所需的焊接材料的强度及用量for calculating the strengths of and amounts of filler metal required for welded joints are given in reference texts and handbooks的最佳的大小,尺寸及外观已经在参考资料及手册中给出。4.the base metal母材5.polarity switch极性转换6.not shortness非短缺7.slag inlusion夹渣8.positional welding 定位焊9.the welding zone焊接区13.types of welds焊接类型15.the ground clamp cable地线夹16the weldability of metals材料的可焊接性
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