REALTIME SURVEYING WITH GPS BOOK (English Version )
English လိုရွင္းျပထားေပမဲ႔ ပုံေလးေတြနဲ႔ ျပထားေတာ့ လြယ္၂နဲ႔နားလည္ႏုိင္တဲ႔စာအုပ္ေကာင္းတစ္အုပ္ပါ လိုအပ္သူမ်ားယူၾကပါ
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