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US law
Massachusetts
Regulations
522 CMR — Board of Boiler Rules
522 CMR 9.00 — Refrigeration and air conditioning systems
Massachusetts · Regulations
522 CMR 9.00 — Refrigeration and air conditioning systems
4 sections
4 sections
522 CMR 9.01
Scope
522 CMR 9.02
Construction
522 CMR 9.03
Installation
522 CMR 9.04
Inspection