Cov khoom tseem ceeb, xws li cov xauv thiab cov menyuam, yog los ntawm German hom thiab raug kuaj xyuas kom ruaj khov kom ntseeg tau ntev - lub sijhawm ruaj khov. Silent rollers txo qhov qhib thiab kaw suab nrov los ntawm kev sib txhuam kom tsawg, ua rau lawv tshwj xeeb tshaj yog haum rau ib puag ncig rhiab rau lub suab. Cov khoom siv kho vajtse muab kev tiv thaiv corrosion zoo dua piv rau cov ntaub ntawv zoo tib yam, txuas ntxiv lub neej tag nrho. Fluorocarbon txheej tsis tsuas yog txhim kho cov tsos, tab sis kuj ntxiv dag zog rau UV tiv thaiv, tiv thaiv fading los yog tawg los ntawm lub hnub raug ntev. Cov kev txhim kho thev naus laus zis no txhim kho cov neeg siv kev paub dhau los ntawm cov ntsiab lus, tsis yog tso siab rau kev lag luam rhetoric los hais txog "siab-kawg" lossis "khoom kim heev."
