: In North American master specifications (CSI MasterFormat), Section 23 23 00 covers Refrigerant Piping . A "piece" in this context refers to specialized hardware like refrigerant split patterns or factory-coated fabrication parts.
Is this a for a construction project? Are you searching for a specific mechanical part ?
: It often refers to a specific music set or ambient "piece" played at 11:00 PM. For example, the Simulacra Show features an hour of ambient bits and pieces starting at 23:00 .
: It falls within the "Evening" (roughly 6 PM – 12 AM) or "Night" (sunset – sunrise).