ဤအရာ Presentation သင်၏ဘာသာစကားတွင်မရှိပါ။, တွင်..ကြည့်ပါ။: English (en),
သို့မဟုတ် ဂူဂယ်ဘာသာပြန်ကိုအသုံးပြုပါ။:  

 

Presented By: Roland Bunch

Event: ECHO East Africa Highlands Symposium 2014 (2014-10-27)

A-frame levels can be used to trace contour lines for soil conservation, or irrigation ditches at ½ % slope. They are highly accurate, and cost nothing.

 

နယ်ပယ်ဒေသ

East Africa