resistance weldingriˈzistənsˈweldɪŋ短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 n.电阻焊接 The existence of grey spot may cause brittle crack of the joint, therefore, controlling grey spot occupy a decisive position to ensure the quality of rail resistance welding. 灰斑的存在易导致接头的脆性断裂。因此，控制灰斑对保证钢轨接触焊质量举足轻重。 cnki