求翻译：a) 管子对口前，焊口表面及附近母材内外壁应无油、漆、垢、锈等，距离焊口每侧10mm-15mm范围内的管子内外壁应进行清理、打磨，直至发出金属光泽。是什么意思？

a) tube counterparts before the weld surface and base metal near the inner and outer walls should be no oil, paint, dirt, rust and other distance on each side of the weld 10mm-15mm within the tube inside and outside the wall to clean, polish, until the issue of metallic luster .

A) * tube counterpart, solder port surface and inside and outside wall near the material should be free of oil, paint, dirt, rust, and so on, each side port weld distance 10mm - 15mm range within and outside the tube wall should be cleaned, sanded to a shiny metal.

a) Pipe suitable front, in the crater surface and nearby parent metal the outer wall should not have the oil, the paint, filthily, the rust and so on, leans from the crater in the 10mm-15mm scope pipe the outer wall to be supposed every time to carry on the cleaning up, the polish, until sends out t

A) tubes on front, welding materials near the surface and inner and outer walls shall be no oil, paint, dirt, rust, pipe welded joints on each side of the distance 10MM-15mm-wide internal and external walls should be cleaned, polished, and issued until the metallic luster.

正在翻译，请等待...