Mumunda wekuchera mafuta uye tsime remafuta, yakakwira-frequency yemagetsi kuramba welded casing (inonzi ERW casing) kana ichienzaniswa neyakagadziriswa casing yakakwira dimensional kurongeka, weld toughness, anti-extrusion ye-high-performance, uye yakaderera mutengo zvakanakira, izvo. yakashandiswa zvakanyanya kune dzimwe nyika ...
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