求英语高手进行语法分析
(1) Similar to a lightning,an electrical arc used for welding is also a process of electricity shedding and as blazing as a lightning,but it is controllable.
(2)Submerged arc welding is defined by the American Welding Society as an arc welding process where in coalescence is produced by heating with an arc or arcs between a bare metal electrode,or electrodes,and the work piece.
(3)It is good for the vertical welding as well as the welding of stern and thick steel plate of the mansion steel structure,with plate thickness as much as 760mm.
(4)However,before we get down to welding,we must make the preparation called edge preparation according to different thickness of plates,Edge preparation has also got another technical term,i.e.groove．