在这一阶段，如果存在问题，可以很容易地改造焊接的连接点。
At this stage, it's easy to remake a solder connection if there is a problem.
第三阶段是关于金属梁系统的定位和焊接。
The third phase relates to the positioning and soldering of the metallic beams system.
三跨的人行桥的桥面为钢结构，总共三段，每段分开焊接制作，通过螺栓连接。
The steel-structure bridge deck is three-span, and each one is welded separately with bolt connection.
每根箍索每隔一段弧距通过焊接方法以圆柱或圆锥状的鼓身固定连接。
Each hoop cable is fixedly connected with the cylindrical or conical drum body at intervals of arc distance through the welding method.
提出采用合理控制装配、焊接顺序以及多段逆向大幅度跳焊法等工艺，可有效控制油罐底板焊接时产生的波浪变形。
The authors consider that rational welding sequence and multi-plate skip welding method can effectively suppress the wave-type deformation of bottom welding.
特点：采用PLC程控，配置日本米亚基ct- 110焊接控制器，三段通电方式，具有电流缓升缓降功能。采用焊接变压器次级反馈控制电流及导通角控制。
Features: PLC programming, equip with Japan Miyachi CT-110 welding control device, three segments electrification method, with current slow increasing and slow dropping function.
研制了用单片机组成的点焊控制箱，可完成三阶段加热焊接循环，实现预热、回火等。
A controlling box is developed using with 8031 single chip microprocessor. It can provides the controlling for 3 stages of heating of welding cycle, preheating and tempering etc.
一种连接管道（3）以制造水下管路（2）的方法，其中两个相邻管道（3） 相互面对、沿着轴（A）对准的自由端（15）被焊接在一起，以限定一段修剪 区域（18）；
A method of joining pipes (3) to produce underwater pipelines (2), wherein the facing free ends (15) of two adjacent pipes (3), aligned along an axis (A), are welded to define a cutback (18);
一种连接管道（3）以制造水下管路（2）的方法，其中两个相邻管道（3） 相互面对、沿着轴（A）对准的自由端（15）被焊接在一起，以限定一段修剪 区域（18）；
A method of joining pipes (3) to produce underwater pipelines (2), wherein the facing free ends (15) of two adjacent pipes (3), aligned along an axis (A), are welded to define a cutback (18);
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