covered by/ wash-blending(表面检验)什么意思? surface examination(表面检验): 1. examination shall be done after completing all required postweld heat treatment, except weld surfaces which will become inaccessible by reason of welded closures which themselves require postweld heat treatment ( e.g., nozzle-to-vessel welds covered by reinforcing pads) shall be examined before such closures are welded. ...... 3. when liquid penetrant examination is required, it shall be performed on all accessible weld surfaces. any surface irregularities which interfere with the examination shall be removed by grinding, machining, or wash-blending with gas tungsten arc welding. 请问标红外的意思: 1. 例如 由补强板覆盖的 管 - 容器焊缝? 2. wash-blending 是什么方法? 查看更多