90% Tiv thaiv kom tsis txhob tuaj yeem yog tus neeg tu nws tus kheej

Cov cwj pwm ua thiab cov coating uas tiv thaiv, uas yog siv rau kev ua, kev tawm tsam, thiab kev tiv thaiv. Rov qab dimension txheej, uas yog siv rau hlau raws li hlau (cavable thiab machinable steel thiab corrosion resisting steel) thiab non-ferrous hlau (nickel, cobalt, tooj liab, txhuas, titanium thiab lawv cov khoom).