ʻO nā pahu i loko o nā ʻoihana like ʻole i ka nui o nā noi, ʻoi aku ka nui o ka petroleum, petrochemical, chemical, metallurgy, electric power, conservancy water, construction urban, fire, machinery, lanahu, meaʻai a me nā mea ʻē aʻe (ʻo ia hoʻi, ka mīkini a me ka ʻoihana kemika. ʻO nā mea hoʻohana o ka mākeke valve he ...
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