To get rid of the weed, rivers or canals, garbage, in which each project is often a collaboration of various public sector private sector. Department of the Navy or Department of corrections because it requires a lot of staff and operation time is quite limited.
Weeding in rivers or garbage collection. Each project is a collaboration of various sectors. At the People's Army or the Department of Corrections. Because it requires many officials And duration of operation are limited.
Weed control in a river, canal, or garbage. In which each project usually is a collaboration of the various sectors, the public sector, the army or กรมราช corrections, because the need for staff).