Check clamps on the vehicle underbody , and replace if necessary .
检查车底的卡箍,如有必要,予以更换。
Manufacturing and sales of pvc-plastisols ( underbody coatings and sealants ) and water-based ink .
pvc抗石击底部涂料、pvc焊缝密封胶和水性油墨产品的生产和销售。
On a typical day at the plant , bsp workers in dark uniforms are hunched over assembling wiring and parts to the underbody of a new electrical railcar , surrounded by several huge steel frames .