The geochemical elementary assemblage of stream sediments is similar to the primary elementary assemblage because the mechanicaltransportation as the main transportation way.
而水系沉积物地球化学异常，由于以机械搬运为主，其元素组合与原生组合相近。
2
Mechanical processes, including solids transportation, crushing and pulverization, screening and sieving.
机械过程，包括固体运输，粉碎，粉碎，筛选，筛分。
3
Swinging mechanical conveyor belt can be moved from the stage of the transportation work.