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2020-06-18View Original

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Reply #22020-06-18

Translate the following 8 texts from chinese_simplified to portuguese. Return ONLY a valid JSON array of translated strings in the same order. No markdown formatting, no explanations.

Reply #32020-06-18

关于管径

Reply #42020-06-18

弱弱的问一下为什么DN21的管子，壁厚是6mm，外径为什么是57.4mm，怎么不是58.4mm？

Reply #52020-06-19

本帖最后由 henglinkon 于 220-6-18 22:14 编辑 DN21是公称直径，不代表内径，也不代表外径。管道的外径是一个制造标准的问题，如果乱了，连接就有问题了。 https://bbs.hcbbs.com/thread-2968222-1-1.html

Reply #62020-06-19

管道有壁厚等级，外径一样，壁厚不一样

Reply #72020-06-20

公称直径是一个标准，不能直接当成内径或外径

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