Zida zama valve wamba ndikuwerengera chidziwitso chaukadaulo Miyezo ya zida za vavu
Zipangizo zamavavu wamba ndi manambala odziwa akatswiri Mavavu zipangizo Miyezo Zipangizo valavu wamba ndi manambala a chidziwitso cha akatswiri, kuphatikizapo WCB, LC3, WC6, WC9, etc., WCB: Carbon steel ASTM A216 ntchito zosawononga, kuphatikizapo madzi, mafuta easygoin...
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