USG#20 這是什麼單位? - 土木
By Brianna
at 2021-03-18T17:12
at 2021-03-18T17:12
Table of Contents
風管分歧處應裝設分歧開關,其材質厚度至少應為
USG#20以上
USG是什麼單位?
用google大神找不到
--
USG#20以上
USG是什麼單位?
用google大神找不到
--
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土木
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