307
edits
Changes
no edit summary
{| border="1" cellpadding="5" cellspacing="0" align="center"
|-
! width="50%" style="background:#efefef;" | Advantages优势! style="background:#f0f8ff;" | Disadvantages不足
|-
| valign="top" | - Very quick in fine and medium sand formations.<br>
|}
===Construction, operations and maintenance建造、运作与维护===
[[Image:Jetting.jpg|thumb|right|200px|Jetting. Credit: WEDC.]]
All drilling equipment, except the motor pump and some valves, is locally produced.
===Field experiences实地经验===
Jetting is mainly used in Niger, Chad, Madagascar, Nigeria, Senegal, Burkina Faso, Uganda, Kenya, Soudan, Benin, Sri Lanka and western countries.
===Manuals, videos and links指南、视频与链接===
* [http://www.unicef.org/malawi/MLW_resources_qualityassureboreholes.pdf CONSULTANCY SERVICES: QUALITY ASSURANCE OF UNICEF DRILLING PROGRAMES FOR BOREHOLES IN MALAWI] UNICEF, 2011.
* [http://www.drillingfab.com Drillingfab.] - Engine powered drilling equipment and small machines.
===Acknowledgements鸣谢===
* [http://www.lboro.ac.uk/well/resources/technical-briefs/43-simple-drilling-methods.pdf 43. Simple drilling methods.] WEDC.