Kev kawm ntawv yog cov yam ntxwv ntawm cov cua kub asphalt

Asphalt cua sov nta:

1, sai cua sov, kub siab hloov efficiency

2, asphalt kub tsis tuaj, kom cov khoom tsis zoo

3, ntshuam thiab export ntawm bitumen kom diav casing, txav ntawm lub asphalt liquidity

4, asphalt imports lim pob tawb uas muaj, xyuas kom meej tias cov tshav kub exchanger yuav tsis daig

5, nplua-mounted qauv ua rau lub tsev kom yooj yim, ruaj ntseg thiab txhim khu kev qha

6, txij nkawm, hloov, nkawm zoojyim

7, ntev rau lub neej

8, cov nyhuv zuag qhia tag nrho yog zoo, nrhiav kev tshiab thiab zoo nkauj