Metadata
Author: LASER-wikipedia2
Data
English[en]
Hollow stem auger drilling is used for softer ground such as swamps where the hole will not stay open by itself for environmental drilling, geotechnical drilling, soil engineering and geochemistry reconnaissance work in exploration for mineral deposits.
Chinese[zh]
空心钻杆可以对较软的土壤,如沼泽等土壤不会自然张开的土壤进行钻探、地质钻探、对矿藏进行土壤工程和地球化学勘察。