1. Muaj peev xwm kho kom tau cov khoom siv tsis zoo los ntawm cov chaw nyob thiab zoo sib xws organic zam;
2. Siv cov hlau tsis xeb nrog cov hlwv corrosion zoo thiab anti -}} Tus kws laus rau ntau tshaj 20 xyoo, thiab fiberglass rau ntau tshaj 50 xyoo;
3. Cov cuab yeej siv tag nrho yog qhov yooj yim los tsim thiab ua haujlwm yooj yim. Txhua cov khoom siv neeg kho tshuab tau tswj hwm thiab txhua cov cuab yeej tuaj yeem ntsia hauv qab saum npoo;