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2.结507和奥102两种焊条牌号中的汉字、数字各表示什么意思?(4分) 结507:结——表示该焊条为结构钢电焊条; 50——表示焊缝金属的抗拉强度≮50公斤/毫米~2; 7——表示药皮类型为低氢型以及要求使用的焊接电源为直流。
2. Knot 507 and Austrian 102 two electrode brands in Chinese characters, the number of each mean? (4 points) Results 507: knot - said the electrode for the structural steel welding electrodes; 50 - that the tensile resistance of the weld metal Strength ≮ 50 kg / mm ~ 2; 7 - said the type of skin is low hydrogen type and the required welding power supply for the DC.