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| piping SP list (Piping specialty (SP) item list. The piping SP list is a listing of the odd items that occur on every job. They are items that are not standard enough to be written into the individual line class specifications. ixtra) | |||
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| piping SP list (Piping specialty (SP) item list. The piping SP list is a listing of the odd items that occur on every job. They are items that are not standard enough to be written into the individual line class specifications. ixtra) | |||