Surveying and Levelling| Biosystems Technology – AL| Unit 03-Part 01 | BST Sinhala a/l technology subjects sinhala
#bimmattamkirima #bimmanuma #survey #levelling #horizontaldistance #distancemeasure Today lesson was based on the part 01 of the series of the Grade 12, Unit 03 of Bio… Read More »Surveying and Levelling| Biosystems Technology – AL| Unit 03-Part 01 | BST Sinhala a/l technology subjects sinhala