Ama-valve ezimbonini ezahlukahlukene ezinhlobonhlobo zezicelo, ikakhulukazi ku-petroleum, i-petrochemical, amakhemikhali, i-metallurgy, amandla kagesi, ukongiwa kwamanzi, ukwakhiwa kwamadolobha, umlilo, imishini, amalahle, ukudla nokunye (okukhona, imboni yemishini namakhemikhali abasebenzisi bemakethe yama-valve...
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