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 China 'GB/T 1859.4-2025 ' standard english version:

　

NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA

GB/T 1859.4-2025

Reciprocating Internal Combustion Engines - Determination of Sound Power Levels by Sound Pressure Method - Part 4: Simple Field Measurement Method
往复式内燃机-声压法声功率级的测定-第4部分:现场测量简易法
Issued Date:2025/8/1 　 Implemented Date:2026/2/1
Issued by: 　 The Standardization Administration of the People's Republic of China
　

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GB Standard Code GB/T 1859.4-2025
Standard Category China National Standards
GB Standard English Title Reciprocating Internal Combustion Engines - Determination of Sound Power Levels by Sound Pressure Method - Part 4: Simple Field Measurement Method{译}
GB Standard Chinese Title 往复式内燃机-声压法声功率级的测定-第4部分:现场测量简易法
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