E like me ka wehe ʻana, ka pani ʻana a me ka hoʻoponopono ʻana i ka mea hoʻoheheʻe a me ka hoʻoneʻe ʻana i ka lepo pipeline, kūpono ka valve butterfly ventilation no ka hoʻoheheʻe ʻana, ka wehe ʻana o ka lepo a me nā ʻōnaehana pale kaiapuni i ka metallurgy, mining, cement, kemika a me ka hana mana.ʻO ka lele ventila v...
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