Kendaraan-kendaraan yang bergerak didarat dan bahagian-bahagian strukturalnya ialah: roda-roda gigi kemudi, (2) tierod-tierod, (3) sambungan-sambungan kemudi, (4) braket-braket kemudi, (5) batang-batang penggerak roda, (6) as-as roda, (7) baritalan-bantalan as roda, (8) batang-batang gardan, (9) gardan-gardan penggerak kendaraan, (10) perkakas-perkakas penggerak alat-alat listrik, (ii) kotak-kotak gigi transmisi, (12) persneling-persneling pemindah gigi, (13) knop-knop persneling pemindah gigi, (14) roda-roda gigi dan (15) pusat-pusat roda untuk otomobil(Pdtor land vehicle structural parts, namely, steering gears, tie rods, steering knuckles, steering brackets, drive shafts, axles, axle bearing, cardan shafts, differentials, electric drives, gear boxes, gear shifts, gear shift knobs, gear wheels and wheel hubs for automobiles)