求翻译：定位焊所用焊条应与正式施焊的焊条相同（对于埋弧焊，定位焊所用焊条应与用手工焊焊接该钢种的焊条相同）。通常，定位焊缝的长度应为50mm～70mm，焊道厚度小于6mm（对于埋弧焊，定位焊焊缝高度不超过4mm）间距250～400mm。定位焊点不能焊在焊缝交叉或拐角处，距焊缝交叉或拐角处的距离不小于板厚的10倍。应采用马板定位。当焊件要求预热时，定位焊前也应预热。定位焊缝焊接工艺与焊缝质量应与施焊焊缝的焊接工艺与质量相同，有缺陷的定位焊在施焊前清除干净。是什么意思？

Positioning of welding electrodes used in welding to be the electrode with the same official (for submerged arc welding, tack welding electrodes should be used for hand welding of the steel rod the same). Typically, the positioning of the length of the weld should be 50mm ~ 70mm, weld thickness less

Positioning welding rod should be used with official welding rod of same (for submerged arc welding wires, positioning welding rod should be used with manual welding rod of the same type 304,304 ). Typically, positioning weld the length should be 50 mm to 70 mm thickness less than 6mm, welding, arc

The positioned weld uses the welding rod to be supposed with the official Shi Han welding rod same (regarding submerged-arc welding, positioned weld to use welding rod to be supposed and welds this aluminum same with manual welding welding rod).Usually, locates the welded joint the length to be supp

Positioning welding electrodes and welding electrodes are the same (for submerged arc welding, positioning welding electrodes and welding the steel rod by hand). In General, pointing weld length should be 50mm~70mm, weld thickness is less than 6mm (for submerged arc welding, positioning welding heig

Positioning welding electrodes and welding electrodes are the same (for submerged arc welding, positioning welding electrodes and welding the steel rod by hand). In General, pointing weld length should be 50mm~70mm, weld thickness is less than 6mm (for submerged arc welding, positioning welding heig