Z-LION PCD-21 3 theka la PCD yopera yopera trapezoid ndi chida cholemera chochotsa zokutira pochotsa zokutira wandiweyani komanso elastomeric monga epoxy, urethane, polyurethane, polyaspartic, acrylic, glue zotsalira, ndi zina. Chidachi chili ndi 3 theka la PCD yozungulira komanso batani lothandizira gawo.Imabwera ndi mbale wamba ya trapezoid, imatha kuyikidwa pazitsulo zingapo zapansi kudzera pamabowo atatu pa mbale ya trapezoid.Amapangidwa kuti azigwira ntchito molunjika, motsata wotchi kapena mopingasa.