Sab hnub tuajDredgingtuaj yeem muab kev daws teeb meem tiav ntawmDREDGING PIPLEINE rauTrailing Suction Hopper Dredger (TSHD) & Cutter Suction Dredger (CSD) nyob rau hauv dredging ntawm chaw nres nkoj & channel thiab reclaiming av los ntawm hiav txwv tej yaam num.