Table 3: Missing value processing records.

Original recordProcessing methodProcessing results

Sand filling, ash addingComplete recordsSand aerated block, ash adding block
GZ1Complete recordsSteel column 1
Short sleeveFilterSemantic ambiguity and inability to divide subdivisional projects
ApproachΦ8, Φ10 bale barFilterThe semantics is not clear, and the quality problem cannot be judged