Kuwongolera kwanthawi zonse kwa ma valve kumafuna njira yokonzekera ma valve
Kukhazikitsa kwa ma valve kumafuna njira yokonzekera chitsanzo cha valavu Lamuloli likugwiritsidwa ntchito poika valavu ya pachipata, valavu yapadziko lonse, valavu ya mpira, valavu ya butterfly ndi kuchepetsa kuthamanga kwa valve mu petrochemical plant. Chongani valavu, valavu chitetezo, ...
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