welding procedure短语¹⁴⁴⁹⁷²⁺² 基本例句 焊接工艺,焊接程序 Some advanced welding procedure, welding rod, welding pressure, welding variable etc to solve these problems and some underwater welding examples are also involved in this paper. 介绍了比较先进的焊条和电流、电压及焊条直径等焊接工艺参数的选择；介绍了水下焊接操作技术以及实际应用的具体做法。 chemyq