rwlle001 发表于 2021-6-2 14:34:47

ISO 6798-1-2020 Reciprocating internal combustion engines — Measurement of sou

ISO 6798-1-2020 Reciprocating internal combustion engines — Measurement of sound power level using sound pressure — Part 1 Engineering method

admin 发表于 2021-6-9 16:24:56

谢谢您的分享，金币已奖励！
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