ERW welded simbi pombi: yakakwirira-frequency kuramba welded pombi, yakagadzirwa inopisa-yakakungurutswa simbi ndiro, kuburikidza anoramba achiumba, kukotama, welding, kupisa kurapwa, saizi, kutwasanudza, kucheka uye mamwe maitiro. Zvimiro: Kuenzaniswa ne spiral seam yakanyudzwa arc welded simbi ...
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