短语词组短语weld toe crack 焊趾裂纹weld solidification crack 焊缝凝固裂纹weld corrosion crack 焊缝破裂weld ream crack 焊缝裂纹weld arer crack 焊缝区裂纹inside weld tiny crack 内焊缝微裂纹weld hot crack 焊缝热裂纹weld cold crack 焊接冷裂纹 返回 weld crack