从酸蚀断面还可以看出：在原自动埋弧焊的上面覆盖有多层焊道。
The etched section also reveals that multiple weld passes were made over the top of the original submerged arc weld pass.
合成了2种助焊活性剂23-二溴丁二酸和环烷基胺氢溴酸盐，制备了ES系列活性助焊剂。
Two active agents for soldering, 23 Dibromosuccinic acid and cycloalkanamine hydrobromide were synthesized. A series of ES active soldering fluxes were prepared.
焊后，身体是腌制-一个过程，使用非常corrisive的氨基酸组合，以消除黑暗氧化铁焊缝附近地区形成了焊接过程中的热量。
After welding, the body is pickled — a process that USES a very corrisive mix of acids to remove the dark iron oxides formed near the weld area by the heat of the welding process.
焊后，身体是腌制-一个过程，使用非常corrisive的氨基酸组合，以消除黑暗氧化铁焊缝附近地区形成了焊接过程中的热量。
After welding, the body is pickled — a process that USES a very corrisive mix of acids to remove the dark iron oxides formed near the weld area by the heat of the welding process.
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