Kev Piav Qhia Luv:

Kev tsim kho hlau cam khwb cia liab uas ruaj khov rau lub neej ntev thiab tiv taus corrosion
Lub log tes dub ruaj khov rau kev ua haujlwm yooj yim
Flanged kawg rau kev teeb tsa yooj yim thiab kev sib txuas
Saw hlau kom tiv thaiv kev qhib lossis kaw tsis tau npaj tseg
Haum rau kev siv rau hauv cov tshuab tiv thaiv hluav taws hauv kev lag luam, kev lag luam