Delivery: 3 seconds (Download full-editable-PDF + Invoice). Quotation: Click GB/T 3222.1-2022>>Add to cart>>Quote Editable-PDF Preview (Reload if blank, scroll for next page)
See Chinese contents: GB/T 3222.1-2022 GB/T 3222.1-2022: Acoustics - Description, measurement and assessment of environmental noise - Part 1: Basic quantities and assessment procedures
