Groove preparation, cleaning before welding and butt welding construction of ther tower were showed.
介绍了坡口加工、焊前清理和上下塔对接施焊进程。
Cleaning the oil stain and rust of the welding surface before welding, choosing suitable welding standard.
焊前须将焊件表面的油污及铁锈清理干净，选择适宜的焊接规范。
Their construction involved the careful deconstruction of the seized up and rusted machine before cleaning, shaping and welding each component into place to create a contemporary and intracate form.
它们的建造包括将这个停止不用、生锈的机器仔细地分解，然后清洗、塑型、再将各个部分焊接起来创造成错综复杂的现代形式。
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