Z-LION PCD-21 peb ib nrab puag ncig PCD sib tsoo trapezoid yog lub luag haujlwm hnyav txheej tshem tawm cov cuab yeej tshem tawm cov tuab thiab elastomeric coatings xws li epoxy, urethane, polyurethane, polyaspartic, acrylic, kua nplaum residue, thiab lwm yam. khawm txhawb ntu.Los nrog cov phaj trapezoid, tuaj yeem ntsia tau rau ntau yam hauv pem teb grinders ntawm 3 qhov ntawm lub phaj trapezoid.Tsim los ua haujlwm nyob rau hauv ib qho kev taw qhia, xws li clockwise los yog counterclockwise.